Restore the number of rows shown on Special:Watchlist

This reverts the result of Iada3a93762dd25fdaf35fb707304abc40bd4a5b1.
This is a manual cherry pick of
Ie722c509a6ad1346b1624abee778f4cbdc79d457,
Ibb23838843a9a1cb8bb23347c3b2de7437861ae0 and necessary parts of
I495d19258205d8713a19aa934a7657aecbe240d4.

Contains only translations of message wlnote which was exported today
with Id59d00bd9402da7fd03a34bd6d0ceb9bd2d00024.

Bug: 62017
Change-Id: I5549e25f22f96eb69059b4d298bc50d11c72f1f1
Check for boolean false result from database query in SqlBagOStuff

Database::select() can return false, so we should check for it before
attempting to iterate on the result or to call methods on it.

Resolved conflicts:
	includes/objectcache/SqlBagOStuff.php

Cherry-Picked: I0862493305e5b2784422e0e94b3e62e734267795
Change-Id: I0862493305e5b2784422e0e94b3e62e734267795
Fetch string to pass through writeTemporary() in DatabaseOracle.php

Pulled some code from insertOneRow() to fix the update() function
and prevent the error warnings in bugzilla 64970 from showing up.
Note that since insertOneRow() and update() contains a lot of
duplicate code, they may be candidates for merging, but that is
outside the scope of this request.

Bug: 64970
Change-Id: I9ff9077d68e77f05f878fc541f87e0a5ce86ecc2
(cherry picked from commit 176213b89849f849e2c8dad2f0a79747b18a8b9d)
Correctly handle incorrect namespace in cleanupTitles.php

If the namespace is not valid; Title::makeTitleSafe() will
return null, thus producing a fatal error. Work arround this
by setting the namespace to 0 in that case.

Bug: 68501
Change-Id: I0c22f9468ff2bf11d2bf4a9265fa454ece2c0fa3
(cherry picked from commit bb985c782704f25f4f9adb61b491e086e90c4cfe)
Display MediaWiki:Loginprompt on the login page

This reinstates functionality removed in 44840d1.

There is no longer a default message, and must
be created on wikis locally.

Bug: 66574
Change-Id: Ife39fe868b46ef054101c2db2e4e901380998c0e
Co-Authored-By: Dan Poltawski <dan@moodle.com>
Merge "Correctly handle incorrect namespace in cleanupTitles.php" into REL1_23
Fix race condition in wfShellExec()

Especially when executing commands that return a relatively lot of data in stdout
quickly, proc_get_status() may return that command has terminated before everything
has been read from pipes. Handle this case by continuing to perform
non-blocking select on the process's streams until all remaining data has been
read.

Bug: 67870
Change-Id: I050292dbb76821f66a15f937bf3aaf4defe67687
Handle invalid language code gracefully in Language::fetchLanguageNames

Core MW doesn't have a problem, but translate extension explodes.
Seems safer to just use 'en' if passed an invalid language code.

Bug: 60629
Change-Id: I0ede3169bb49001a1515ae5b2b6d28477704f346
(cherry picked from commit 634905558b2b2a658d55ee98b3200d9bd0731fe4)
Updated release notes and version number to MediaWiki 1.23.3

This is MediaWiki 1.23.3 maintenance release.

Change-Id: I046c63794daf83fe27960e6e388b76de763c8458
Merge branch 'REL1_23' of https://gerrit.wikimedia.org/r/p/mediawiki/core into REL1_23