Hotpot MDL-25770 - missing return - thanks to Tomasz Pawlik for report/fix
MDL-20946 fix gradebook SQL to cope with multi-role and deleted users.
Cherry-picked changes for PULL-460/MDL-26557 into MOODLE_19_STABLE
Merge branch 'm19_MDL-25770_hotpotfix' of git://github.com/danmarsden/moodle into MOODLE_19_STABLE
weekly release
MDL-26985 new Moodle 2.1 requirements

For now only extra PHP 5.3.2 requirement compared to 2.0.
MDL-26966 improve self URL validation
Merge branch 'w13_MDL-26966_19_urlparsing' of git://github.com/skodak/moodle into MOODLE_19_STABLE
gradebook MDL-20946 switched from using IN to using JOIN in the quiries
weekly release
Merge branch 'MDL-20946_19_simplehistory' of git://github.com/andyjdavis/moodle into MOODLE_19_STABLE
weekly release 1.9.11+
MDL-27108: Fix invalid SQL syntax in mod/data/field/latlong
MDL-26130 css fix for orangewhite theme
MDL-27069 fix notice when inserting images in editor
Merge branch 'w15_MDL-27069_m19_httpsrequired' of git://github.com/skodak/moodle into MOODLE_19_STABLE
Merge branch 'MDL-26130' of git://github.com/MaryE/moodle into MOODLE_19_STABLE
weekly release 1.9.11+
SCORM MDL-26450 fix undefined pkgtype warning (ONLY REQUIRED IN 1.9 STABLE BRANCH)
MDL-24355 Greatly improved performance of the tag correlation function and fixed up bugs with it