FIX: Detect DiscourseHub user agent.

FIX: Detect DiscourseHub user agent.

It used to show up as an unknown device and browser in user preferences (Recently Used Devices).

diff --git a/lib/browser_detection.rb b/lib/browser_detection.rb
index f2e8639..e2f8d46 100644
--- a/lib/browser_detection.rb
+++ b/lib/browser_detection.rb
@@ -16,7 +16,7 @@ module BrowserDetection
       :safari
     when /MSIE/i, /Trident/i
       :ie
-    when /DiscourseHub/i
+    when /Discourse/i
       :discoursehub
     else
       :unknown
@@ -54,7 +54,7 @@ module BrowserDetection
       :android
     when /CrOS/i
       :chromeos
-    when /iPhone|iPad|iPod/i
+    when /iPhone|iPad|iPod|Darwin/i
       :ios
     when /Macintosh/i
       :macos
diff --git a/spec/lib/browser_detection_spec.rb b/spec/lib/browser_detection_spec.rb
index afeb8e9..b6faa54 100644
--- a/spec/lib/browser_detection_spec.rb
+++ b/spec/lib/browser_detection_spec.rb
@@ -31,7 +31,8 @@ describe BrowserDetection do
       ["Opera/9.80 (X11; Linux zvav; U; en) Presto/2.12.423 Version/12.16", :opera, :linux, :linux],
       ["Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edge/12.246", :edge, :windows, :windows],
       ["Mozilla/5.0 (X11; CrOS x86_64 11895.95.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.125 Safari/537.36 ", :chrome, :chromebook, :chromeos],
-      ["Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edg/75.10240", :edge, :windows, :windows]
+      ["Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edg/75.10240", :edge, :windows, :windows],
+      ["Discourse/163 CFNetwork/978.0.7 Darwin/18.6.0", :discoursehub, :unknown, :ios]
     ].each do |user_agent, browser, device, os|
       expect(BrowserDetection.browser(user_agent)).to eq(browser)
       expect(BrowserDetection.device(user_agent)).to eq(device)

GitHub sha: 8aa5df69