Merges r134278-wpcom.

Merges r134279-wpcom.

Merges r135921-wpcom.

…aking changes merged.

Merges r142918-wpcom.

The file now matche's core GP. Updating wpcom's locales is being tracked here:
https://[private link]

Merges r148109-wpcom.

Reverts #4081

Conflicts:
	locales.php

Fixes a typo in r131877, checking against correct `IS_WPCOM` constant (not `WPCOM`)

Should resolve cases where large images would result in open graph meta tags being output with incorrect dimensions.

See: r131877
See: https://[private link]

Merges r135069-wpcom.

… HTTPS to match WP.com sites and avoid mixed content errors.

Fixes #7745 props jeherve.

Merges r136338-wpcom.

…urn by wp_get_attachment_image_src.

This fixes the issue for new jetpack sync (4.2) where the publicised tweets were not including the featured image of a post in the tweet. Since in the new sync implementation we don't save the post meta information about the featured image  in the post meta. Now we sync data about the featured image and the attachment info as well.

Merges r139875-wpcom.

The `[gallery]` shortcode needs the global post object set to the context of
the shortcode so juggle the global object so we get the correct images back.

See:
https://[private link]#comment-24665

Merges r148733-wpcom.

Conflicts:
	class.jetpack-post-images.php

…cluded from a check in parse-logs

See: https://[private link]

Merges r119486-wpcom.

This was fixed in the Github Jetpack repo a year ago: 5ee6abd#diff-b7122d1b000681bcb6ca40926c711ab1

PHP 7 likes to complain about PHP 4 style constructors

Merges r138589-wpcom.

Summary:
Add a couple of bot/scraper user agents to is_bot_user_agent(), which is called in parse-logs.php.
Hide 'DOCUMENT_REFERRER' in stats, using users_hate_this_link().
See: https://[private link]

Test Plan:
[x] In wpsh, check that this returns TRUE: return Jetpack_User_Agent_Info::is_bot_user_agent( "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0) LinkCheck by Siteimprove.com" )
[x] In wpsh, check that this returns TRUE: return Jetpack_User_Agent_Info::is_bot_user_agent( 'Mozilla/4.5 (compatible; HTTrack 3.0x; Windows 98)' )
[x] When sandboxed, check that no DOCUMENT_REFERRER referrer is listed here: https://wordpress.com/my-stats/?view=referrers&summarize&numdays=7&blog=2210655&unit=1

Reviewers: hypertextranch

Reviewed By: hypertextranch

Subscribers: batmoo

Differential Revision: https://[private link]

Merges r146608-wpcom.

Conflicts:
	class.jetpack-user-agent.php

Image extractor should return info about the gallery images got extracted from.

Merges r135012-wpcom.