* dhruvgoel92/feature/postgresql-fulltext-search: (28 commits)
[feature/postgresql-fulltext-search] supports_phrase_search function
[feature/postgresql-fulltext-search] use proper variable name
[feature/postgresql-fulltext-search] each config is checked if it is set
[feature/postgresql-fulltext-search] fix formatting
[feature/postgresql-fulltext-search] add docblocks to functions
[feature/postgresql-fulltext-search] remove phrase search code
[feature/postgresql-fulltext-search] define access control specifiers
[feature/postgresql-fulltext-search] use version_compare
[feature/postgresql-fulltext-search] fix language key
[feature/postgresql-fulltext-search] remove Readme
[feature/postgresql-fulltext-search] removes pcre check
[feature/postgresql-fulltext-search] fix language tsearch2 to text search
[feature/postgresql-fulltext-search] remove mbstring support
[feature/postgresql-fulltext-search] change language for pgsql < 8.3
[feature/postgresql-fulltext-search] use phpbb_pcre_utf8_support()
[feature/postgresql-fulltext-search] fix variable name
[feature/postgresql-fulltext-search] Fix version comparison for 9.0+.
[feature/postgresql-fulltext-search] fixing license
[feature/postgresql-fulltext-search] assign empty stats
[feature/postgresql-fulltext-search] remove backward compatibility
...
Unused Code for phrase search removed as pgsql doesnt support it. An added
message is displayed if user tries to perform exact phrase search.
PHPBB3-9730
* develop-olympus:
[ticket/10653] Call get_row_count of base class in mysql get_estimated_row_count
[ticket/9813] Only get posts table row count if we detected a fulltext index.
[ticket/9813] Also use estimated row count of posts table for fulltext mysql.
[ticket/10653] Fix parameter to substr() in unit tests. Should be 1, not -1.
[ticket/10653] Unit tests for get_row_count() and get_estimated_row_count().
[ticket/10653] Add ability to count table rows to database abstraction layer.
[ticket/9813] Use table status row count only if greater than 100000 or exact.
[ticket/9813] Use SHOW TABLE STATUS to get search stats for native on MySQL.
Since this is 'only' for statistics anyway, using an estimated value does no
harm. Also, if MyISAM is the underlying storage engine for the posts table,
the value will actually be exact.
PHPBB3-9813
* develop-olympus:
[ticket/10630] Use sql_like_expression() method instead of hardcoded LIKE '%x%'
[ticket/10630] Perform array_unique on authors array before creating the query
Search backends are now required to be autoloadable. The database updater to
3.1 tries to guess the class name as phpbb_search_<oldname> which works for
the default backends we ship.
PHPBB3-10323
Wildcards without any further result restrictions will cause phpBB to search
for everything, potentially allowing a DoS attack against the DB server by any
user who can use the search system.
PHPBB3-9760
The Fulltext_mysql class had different behavior when a dash was entered in the
search query than the fulltext_native class. Specifically, a dash was
automatically turned into boolean NOT even when the user wanted to search for
legitimate hyphenated words like farty-pants
PHPBB3-9749
