Log Message:
Update to 1.0.18.
The rlimit issue adressed in patches ac,ad,ae was already addressed in
release 1.0.11, so remove them.

Omega 1.0.18 (2010-02-14):

indexers:

* Make the default charset "utf-8" not "UTF-8" as we lower \ 
case explicitly
  specified character sets to compare to see if we need to reparse.  Previously
  XML documents which explicitly specified their character set as UTF-8 would
  cause needless restart or the parser.

* omindex:

  + Increase the wdf boost for the document title from 2 to 5, since 2 isn't
    really enough.

* scriptindex:

  + Don't abort with "Unknown Exception" if indexing is disallowed or \ 
we hit
    </body> for a document which had an overridden character set.  Fixes
    ticket#410.

Omega 1.0.17 (2009-11-18):

indexers:

* omindex:

  + On Linux, change the memory limit on external filters to use _SC_PHYS_PAGES
    since _SC_AVPHYS_PAGES excludes pages used by the OS cache and so will
    often report a really low value.  Fixes Debian bug#548987 and ticket#358.

  + Fix likely crash when reading output from external filter program if read()
    is interrupted by a signal.

  + Fix potential crash when indexing PostScript files (fixed by using delete[]
    (not delete) for array allocated by new[]).

testsuite:

* utf8converttest: Charset "8859_1" isn't understood by Solaris \ 
libiconv, and
  isn't a standard charset name, so just test it when using our built-in
  converter and GNU libc.

portability:

* Fix build failure on Mac OS X 10.6.

* Also check for socketpair() in -lxnet if it isn't found without, which
  enables resource limits on external filter programs called by omindex on
  Solaris, and possibly some other platforms.  Fixes ticket#412.