MDL-48224 cron: Buffer SMTP connections around tasks
MDL-48088 calendar: normalize DTEND, add romance standard time

Thanks to Cedric Mortiers (cmortiers@stjohns.be) for providing the patch.
MDL-48580 report_log: fix site errors dropdown

Thanks Renaat Debleu for pointing this bug and share a solution.
MDL-48534 mod_assign: display correct workflow state and marker
MDL-48591 calendar: Mini Cal Display DST Events
MDL-48638 database SQL: Fix typo in exception constructor
MDL-48653 behat: Steps to click and dismiss a dialogue.

We already had the corresponding
    I click on "Home" "link" confirming the dialogue
but I needed the opposite
    I click on "Home" "link" dismissing the dialogue
MDL-48421 navigation: correctly load child categories if parent is loaded
MDL-48421 navigation: accounting for potential regression
MDL-48062 atto_image: Add image select on single click
MDL-48483 admin: attached color label to input control
MDL-48639 behat upload: support absolute paths & better errors

In a custom step I needed to be able to upload a file I had previously
saved to $CFG->dataroot/temp, but that was not possible.

Also, the failure was not at all obvious. I have made it throw a clear
exception if the file you are trying to upload does not exist.
MDL-48666 quiz: let JS to get a Qs slot number on the summary page
Merge branch 'MDL-48666_27' of git://github.com/timhunt/moodle into MOODLE_27_STABLE
Merge branch 'MDL-48088-27' of git://github.com/jethac/moodle into MOODLE_27_STABLE
Merge branch 'MDL-48653_27' of git://github.com/timhunt/moodle into MOODLE_27_STABLE
MDL-48653 behat: fix incorrect phpdoc
Merge branch 'MDL-48591_m27' of https://github.com/jrchamp/moodle into MOODLE_27_STABLE
Merge branch 'MDL-48580-27' of git://github.com/lameze/moodle into MOODLE_27_STABLE
Merge branch 'm27_MDL-48483' of https://github.com/totara/moodle into MOODLE_27_STABLE