Added `openssl_verify_mode` parameter for action_mailer.

- parameter in `environments/production.rb`
- documentation & default value (nil) in `discourse_defaults.conf`
loosen spacing a bit on embedded topics
copyedits on embedded posts
rearranging layout to better fit the new username placement
fix in-reply-to names for mobile embed
Merge pull request #2331 from awesomerobot/master

rearranging layout to better fit the new username placement
fix p:last-of-type on embed topic blockquotes
Update discovery_topics_view.js

I guess this is a typo
fix funky French language on 503 error page.
FIX: Don't show links to private messages in the gutter
FIX: Modals weren't closing when routing to raw links
FIX: Topic archetype check should only happen when the topic exists
Add more stats to version check
Removed invite on ENTER key


1. We can not use this feature as admins
2. It will be inconsistent if admins don't have it and others do
3. inviting people by mistake is no good

tab enter should do fine
Adjust username styling
version 2.1.2 is out
BUGFIX: initial migrate was broken cause bust schema was cached
lighter TH on topic-list
Merge pull request #2337 from awesomerobot/master

lighter TH on topic-list
FEATURE: logster env tab, log current user