update wikihttpd.php

 * fix for moniwiki 1.2.0
 * fixed PHP warnings
TitleIndexer: getLikePages() method added

 * and use titleindexer->getLikePages()
RecentChanges: fixup for $use_group option
remove $use_indexer from TitleSearch macro
remove titlesearch with $use_indexer

 * its more slower then the new text based titleindexer..
fix the name of the selected titleindex cache
Navigation plugin: do not touch pagelinks
Backlinks: fix to save backlinks correctly
Backlinks: check links correctly and always save backlinks

 * non-exist pages also save backlinks
ltrim() wiki words
fixup get_pagelinks() to get the same pagelinks obtained by the send_page()
FullSearch: use backlinks cache correctly
FullSearch: use the titleindexer->pageCount() to get the number of pages
FullSearch plugin: hide the refresh link for backlink search.

and $show_refresh option added to show the refresh link
extract store_pagelinks() method from the Formatter class

and fixup get_pagelinks() method to use the get_pagelinks()
add $use_backlink_search option to disable backlink searching

backlinks are already indexed in normal case.
WikiPage: add cache_instructions() method added

code refactoring and save "#redirect" PI separately
TitleIndexer: added update() method to extend the lifetime of it.
remove the pagelinks indexing feature using the indexer class

now only fulltext search use the indexer.DBA class
remove the batch script of the pagelinks indexer