PHPMailer: Merge upstream commit (PR274).

props zodiac1978.
fixes #27946.

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git-svn-id: http://core.svn.wordpress.org/trunk@29555 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove unnecessary semicolon.

props ixkaito.
fixes #29784.
Built from https://develop.svn.wordpress.org/trunk@29784


git-svn-id: http://core.svn.wordpress.org/trunk@29556 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Show the number of approved comments instead of all comments on
the dashboard in the "At a glance" section.

fixes #26738. props benjmay
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git-svn-id: http://core.svn.wordpress.org/trunk@29557 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use a more specific selector for the count displayed on Add Themes network admin screen.

props mantismamita, nikolov.tmw.
fixes #29421.
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git-svn-id: http://core.svn.wordpress.org/trunk@29558 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use HTTPS links for planet.wordpress.org

see #27115
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git-svn-id: http://core.svn.wordpress.org/trunk@29559 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use HTTPS URLs for core.trac.wordpress.org

see #27115
Built from https://develop.svn.wordpress.org/trunk@29788


git-svn-id: http://core.svn.wordpress.org/trunk@29560 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use HTTPS URLs for trac.wordpress.org (and use core.trac.wordpress.org)

see #27115
Built from https://develop.svn.wordpress.org/trunk@29789


git-svn-id: http://core.svn.wordpress.org/trunk@29561 1a063a9b-81f0-0310-95a4-ce76da25c4cd