CVS log for unreal/Config

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Current tag: unreal3_2_fixes

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- Fix invalid use of 'wc -l' when detecting the AsynchDNS feature of
  libcurl which breaks compilation on FreeBSD; instead use 'grep
  -q'. Reported by Jobe (#3981), solution proposed by satmd.

- Fixed bug with curl not finding libcares, reported by katslaw.
- Added workaround for 'curl-config' depending on 'bc'.

- Reverted an IPv6/Config fix I did on July 17. Reported by chotaire (#3958).

- Same for IPv6

- Fixed similar bug like nospoof with ./Config, but now with prefixaq.

- Initialize ARG parameter properly in ./Config, otherwise everything fails.

- The configure.ac change silently changed the nospoof parameter in
  ./configure. This meant that the answer to NOSPOOF in ./Config was ignored
  and it was always enabled.

- Added some checks in ./Config which (often) ensures that the self-compiled
  curl version is new enough and is not using a c-ares which is binary
  incompatible. If the self-compiled curl version is (too) outdated, then we
  now suggest to rename it and have the installer re-download and compile
  it automatically. This avoids some potential crashes.

- The patch from #0003888 made ./Config favor the curl in /usr, even if it
  was not compiled with c-ares, which is clearly a bad idea as then the
  entire IRCd can hang for several seconds or more...
  We now check if they support asynch DNS, and skip them if they don't.

- Move configure.ac to the project's root.
- Separate m4 macros into *.m4 files (it is much easier to run aclocal now).
- Remove unused DOMAINNAME macro and --with-hostname= options as the DOMAINNAME macro isn't used anywheres and its use shouldn't be encouraged.
- autogen.sh to bootstrap the buildsystem. We now maintain setup.h with autoheader.
- --disable-blah now does the opposite of --enable-blah. The same for --with-blah and --without-blah. (This makes Gentoo users happier).

- ./Config now remembers extra/custom ./configure parameters.

- Remove the Compile as hub/leaf'' concept as I'm quite sure this doesn't actually do anything (#0003891)

- Updated ./Config description for NOSPOOF, it already said it protects
  against HTTP POST proxies, now added some extra text to say it also
  protects against the Firefox XPS IRC Attack. Also made NOSPOOF enabled by
  default on *NIX (this was already the case on Windows).
- Updated ./Config description for DPATH. Seems quite some people answer
  this question wrong, and when that happens, you only get some obscure
  error when running './unreal start'.
- Fixed 'unreal' script to give a better error if it cannot find the IRCd
  binary.

Removed old coders, pretty outdated...

- Added patch from ohnobinki (#0003888), only slightly edited, which improves
  curl detection, added checks to see if curl actually works (print out a
  clear curl error during configure, instead of getting an error during
  'make'), and we now error when using --enable-libcurl without
  --with-system-cares if the system curl depends on c-ares. This is because
  this can cause ABI incompatability between curl's c-ares and our c-ares,
  which leads to odd issues such as:
  Could not resolve host: www.example.net (Successful completion)
  And possibly other weird issues, perhaps even crashes.

curl auto-installation:
- Made ./Config description about remote includes a bit more clear.
- When you now answer Yes to Remote includes in ./Config and $HOME/curl does
  not exist, it now asks you if you want to automatically download and
  install curl (which is done by ./curlinstall).
  This has been tested on Linux, further testing on f.e. FreeBSD is
  required.

- Added support for "chained" extbans. Put simply this allows extban combinations
  such as ~q:~c:#test to only silence users on #test, for example. This feature
  is enabled by default, but can be disabled during ./Config -advanced. Module
  support for this feature must note the following:
  - For is_ok function, the extban can either assign extban_is_ok_nuh_extban, which
    will deal checking a chained extban (including checking for restricted extbans),
    or it can call that function from its own is_ok routine. For the latter case,
    remember to pass only the mask part of your ban format (ie, don't just pass para as
    otherwise it'll just call your is_ok again).
  - For conv_param function, the extban can either assign extban_conv_param_nuh_or_extban,
    which will automatically call conv_param for a chained extban, or pretty up a n!u@h mask.
  - For is_banned, the extban should call ban_check_mask with the mask part of the parameter.
    This will automatically call is_banned for a stacked extban, or match against a n!u@h. n!u@h
    is checked against the current user (ie, with the info in the globals ban_ip, etc), so things
    can get weird if you call this outside a normal ban check.
  Modules must keep in mind that chained extban support is not available (and neither are the three
  functions above) if DISABLE_STACKED_EXTBANS is #defined (this is controled by Config). Modules will
  not compile/load if they try to use them anyway.
  This change should not break extban modules, and should need some more extensive testing.
- Misc fix for disabling extban chains, should've done stuff in our autoconf
  stuff instead of hacking configure directly :P .

#0003216 patched by djGrrr, regarding when you run ./Config for a second

then again, that didn't work

This is easier :P

- On certain (newer?) FreeBSD's you get "make: Permission denied" after ./Config, but when
  you do 'cd ..' and then 'cd -' again, make works just fine. This is going to be the most
  stupid workaround in history... Reported by vonitsanet and others (#0002926).

- Changed default PREFIX_AQ behavior to ON instead of OFF. Since basically all major IRC
  clients support it now (mIRC, xchat, epic, eggdrop, Klient, PJIRC, irssi, CGI:IRC, etc).
  It has always been weird that win32 had it ON by default and *NIX OFF, anyway.
  Naturally this change will be mentioned clearly in next release notes.

slight ./Config text change regarding prefixes

- Made the "strict aliasing"-warning-disabler use $CC instead of gcc.
- Made ./Config better react to errors (no longer print a "everything is a big success"
  kind of message when in fact everything went wrong).
- Made ./Config (configure) exit on openssl or zlib not found errors, instead of
  silently continueing and then causing trouble later on. Also now printing _a bit_
  more helpful error message.

- Fixed a TKL crash on incorrect *line, reported by nanookles1234 (#0002524).
- Redid include dependencies in Makefile, this makes things safer because on any .h change it
  would force a recompile of all files, but it could mean things will be a bit slower for us
  coders unless we tweak it later on.
- Changed whois a bit to print less useless results.
- Added several indicators to the "detect binary incompatible modules"-system such as detecting
  of a ziplinks module on non-ziplinks (on windows this is ok however), nospoof module on a
  a server without nospoof server, etc. Hopefully this will help some people preventing odd
  crashes because they did not recompile or (re)install modules properly.
- Added './unreal backtrace', so far this has only been tested on Linux and FreeBSD.
- Fixed a bug making ./Config not load the previously stored settings on Solaris 10 and
  probably other Unixes, reported by lion-o (#0002474).

Fixed a couple of problems introduced with the ./Config -advanced changed

$arg -> $ARG

Made ./Config better handle command line arguments, Removed NAZIISH_CHBAN_HANDLING as it didn't do anything, Added -advanced flag to ./Config to configure advanced options

Made environment variables correctly work in Config