* merging changes done to the key cache since May 2006 into Maria
* enabling two small enough page cache's unit tests by default
* fix to have non-buffered output in unit tests (to not have a false
timeout killing in pushbuild) (patch given by Serg)
* removing some warnings of gcc -ansi


include/lf.h:
  getting rid of "warning: ISO C does not allow extra `;' outside of a function"
  (gcc -ansi)
mysys/lf_hash.c:
  getting rid of "warning: ISO C does not allow extra `;' outside of a function"
  (gcc -ansi)
mysys/mf_pagecache.c:
  Cosmetic changes to minimize the diff with the key cache.
  #define PAGECACHE_DEBUG_LOG is not needed (just define PAGECACHE_DEBUG
  if you want) (this change removes "warning: 'pagecache_debug_print'
  declared `static' but never defined").
  Importing changes made to mf_keycache.c since May 2006, into the page cache.
  Disabling online resizing in the page cache.
  Fix for "warning: ISO C90 forbids mixed declarations and code".
unittest/mysys/Makefile.am:
  Of the page cache's unit tests, two are small enough to run on pushbuild,
  renaming them to a -t suffix.
unittest/mytap/tap.c:
  pushbuild kills a test after seeing no output from it for 10 minutes;
  so we set the mytap framework to not buffer output (patch given by
  Serg) so that output is seen more frequently and not "all at the end
  of the test".