weekly release 2.6.2+
MDL-35305 wiki: backup and restore files

Thanks to Tatsuya Shirai for the patch
MDL-44843 try to hack around strict locale names in OSX
MDL-33486 wiki: allow searching individual wikis
MDL-41102 report_performance: correctly check state of automated backups

Thanks to Renaat Debleu for the patch
MDL-31262 fix quiz review capability check.

This change is logically the same as changing
    $this->has_capability('mod/quiz:viewreports')
to
    $this->has_capability('mod/quiz:viewreports') || $this->has_capability('mod/quiz:preview')
in the original code. However, I rewrote the logic so that we test the
most common and performance-critical case first - that of a student
lookign at their own attempt.
MDL-44746 core_events: removed incorrect use of snapshot
MDL-44746 core_events: minor changes to the user_deleted event
MDL-44862 always add dbport to dbsocket in pg driver

This should hopefully resolve problems when using sockets connection
to pg servers running on non-standard ports.
MDL-41063 Lesson qformat_default class is missing an error function
MDL-44862 postgres: tests to support socket & port

Both the database auth and enrol plugins use ADOdb
to perform connections. Socket and port are allowed
there if passed as "socket:port", so, when both are
configured in CFG, we pass them that way. Else
ADOdb defaults to standard port (5432).
Merge branch 'MDL-44822_26' of git://github.com/aolley/moodle into MOODLE_26_STABLE
MDL-44583 Assign: performance fixes
MDL-44850 theme: 'eot' font type not served.
MDL-44854 theme: 'svg' font type not served.
MDL-44837 Behat: 'dialogue' selector only works for confirm dialogues

The dialogue selector in Behat (used only in one place) didn't work for
other types of standard Moodle notification dialogue.
Merge branch 'wip-MDL-44850_M26' of git://github.com/gjb2048/moodle into MOODLE_26_STABLE
Merge branch 'wip_MDL-44854_M26' of git://github.com/gjb2048/moodle into MOODLE_26_STABLE
Merge branch 'MDL-44837-m26' of git://github.com/sammarshallou/moodle into MOODLE_26_STABLE
Merge branch 'MDL-44590-26' of git://github.com/danpoltawski/moodle into MOODLE_26_STABLE