MDL-38102 lib: Check for null return value from password_hash function call
MDL-37942 Images with non-alphanumeric chars in file name won't export
MDL-37966 Assignment: put upgraded modules where the originals were
MDL-38361: Fixed typos in mod/assign/locallib.php
MDL-38480_m Fix for messy usage of language strings in block course overview
MDL-26120 mod_forum: use correct object
MDL-39033 Conditional availability: Available items dimmed to students
MDL-34939: Fix clamdscan permissions-related issues

Use --fdpass parameter that passes the file descriptor permissions to clamd,
which allows to scan given file irrespective of directory and file
permissions. Changing file permissions is not required.
MDL-39135 assign_feedback: fix missing renderer argument

assign_user_summary expects extra profile fields
MDL-39163 usability: New Moodle icon
MDL-39163 repository: Make use of the new Moodle icon
MDL-34434 Change the texts saying that we'll be removing web service deprecated functions from 2.5
MDL-38710 assign: fix missing setType calls
MDL-38710 assign: convert selectedusers to PARAM_SEQUENCE

This param type is more appropiate.
MDL-38710 assign: Fix one typo and change one param to PARAM_BOOL
MDL-38889 Community finder search display setType() form warnings
MDL-39185 mod_forum: declare new object before creating member variables to prevent Strict Standards warning
MDL-39167 quiz access rules: need to validate their settings.

We were missing the hook in the form validation method. We had them
everywhere else they were needed.
MDL-38777 JavaScript: Remove YUI cache persistence

The cache does not need to be persistent within the same request and this
just holds memory open for no good reason.
MDL-39206 theme_bootstrap: Added resized/opaque screenshot.jpg