Merge branch 'master' into glitch-soc/merge-upstream

Conflicts:
- .github/ISSUE_TEMPLATE/bug_report.md
  Took our version.
- CONTRIBUTING.md
  Updated the embedded copy of upstream's version.
- README.md
  Took our version.
- app/policies/status_policy.rb
  Not a real conflict, took code from both.
- app/views/layouts/embedded.html.haml
  Added upstream's changes (dns-prefetch) and fixed
  `%body.embed`
- app/views/settings/preferences/show.html.haml
  Reverted some of upstream changes, as we have a
  page dedicated for flavours and skins.
- config/initializers/content_security_policy.rb
  Kept our version of the CSP.
- config/initializers/doorkeeper.rb
  Not a real conflict, took code from both.

Gemfile.lock

@@ -182,7 +182,7 @@ GEM
     docile (1.3.0)
     domain_name (0.5.20180417)
       unf (>= 0.0.5, < 1.0.0)
-    doorkeeper (5.0.0)
+    doorkeeper (5.0.1)
       railties (>= 4.2)
     dotenv (2.5.0)
     dotenv-rails (2.5.0)
@@ -211,7 +211,7 @@ GEM
     fast_blank (1.0.0)
     fastimage (2.1.4)
     ffi (1.9.25)
-    fog-core (2.1.2)
+    fog-core (2.1.0)
       builder
       excon (~> 0.58)
       formatador (~> 0.2)
@@ -219,8 +219,8 @@ GEM
     fog-json (1.2.0)
       fog-core
       multi_json (~> 1.10)
-    fog-openstack (1.0.3)
-      fog-core (~> 2.1)
+    fog-openstack (0.3.7)
+      fog-core (>= 1.45, <= 2.1.0)
       fog-json (>= 1.0)
       ipaddress (>= 0.8)
     formatador (0.2.5)
@@ -271,7 +271,7 @@ GEM
     httplog (1.1.1)
       rack (>= 1.0)
       rainbow (>= 2.0.0)
-    i18n (1.1.0)
+    i18n (1.1.1)
       concurrent-ruby (~> 1.0)
     i18n-tasks (0.9.25)
       activesupport (>= 4.0.2)
@@ -360,7 +360,7 @@ GEM
       concurrent-ruby (~> 1.0.0)
       sidekiq (>= 3.5.0)
       statsd-ruby (~> 1.2.0)
-    oj (3.6.11)
+    oj (3.6.12)
     omniauth (1.8.1)
       hashie (>= 3.4.6, < 3.6.0)
       rack (>= 1.6.2, < 3)
@@ -417,7 +417,7 @@ GEM
       pry (>= 0.10.4)
     public_suffix (3.0.3)
     puma (3.12.0)
-    pundit (1.1.0)
+    pundit (2.0.0)
       activesupport (>= 3.0.0)
     raabro (1.1.6)
     rack (2.0.5)
@@ -587,7 +587,7 @@ GEM
     stoplight (2.1.3)
     streamio-ffmpeg (3.0.2)
       multi_json (~> 1.8)
-    strong_migrations (0.2.3)
+    strong_migrations (0.3.1)
       activerecord (>= 3.2.0)
     temple (0.8.0)
     terminal-table (1.8.0)
@@ -618,7 +618,7 @@ GEM
       unf (~> 0.1.0)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    tzinfo-data (1.2018.5)
+    tzinfo-data (1.2018.6)
       tzinfo (>= 1.0.0)
     unf (0.1.4)
       unf_ext
@@ -680,8 +680,8 @@ DEPENDENCIES
   faker (~> 1.9)
   fast_blank (~> 1.0)
   fastimage
-  fog-core (~> 2.1)
-  fog-openstack (~> 1.0)
+  fog-core (<= 2.1.0)
+  fog-openstack (~> 0.3)
   fuubar (~> 2.3)
   goldfinger (~> 2.1)
   hamlit-rails (~> 0.2)
@@ -727,7 +727,7 @@ DEPENDENCIES
   pry-byebug (~> 3.6)
   pry-rails (~> 0.3)
   puma (~> 3.12)
-  pundit (~> 1.1)
+  pundit (~> 2.0)
   rack-attack (~> 5.4)
   rack-cors (~> 1.0)
   rails (~> 5.2.1)
@@ -755,7 +755,7 @@ DEPENDENCIES
   stackprof
   stoplight (~> 2.1.3)
   streamio-ffmpeg (~> 3.0)
-  strong_migrations (~> 0.2)
+  strong_migrations (~> 0.3)
   thor (~> 0.20)
   tty-command (~> 0.8)
   tty-prompt (~> 0.17)
@@ -766,7 +766,7 @@ DEPENDENCIES
   webpush
 
 RUBY VERSION
-   ruby 2.5.0p0
+   ruby 2.5.3p105
 
 BUNDLED WITH
-   1.16.5
+   1.16.6