Make `browse` and `compare` respect `protocol` config option

Allows using these commands for Enterprise configurations over regular HTTP.

features/browse.feature

@@ -142,3 +142,17 @@ Feature: hub browse
     And the "upstream" remote has url "../path/to/another/repo.git"
     When I successfully run `hub browse`
     Then "open https://github.com/mislav/dotfiles" should be run
+
+  Scenario: Enterprise repo
+    Given I am in "git://git.my.org/mislav/dotfiles.git" git repo
+    And I am "mislav" on git.my.org with OAuth token "FITOKEN"
+    And "git.my.org" is a whitelisted Enterprise host
+    When I successfully run `hub browse`
+    Then "open https://git.my.org/mislav/dotfiles" should be run
+
+  Scenario: Enterprise repo over HTTP
+    Given I am in "git://git.my.org/mislav/dotfiles.git" git repo
+    And I am "mislav" on http://git.my.org with OAuth token "FITOKEN"
+    And "git.my.org" is a whitelisted Enterprise host
+    When I successfully run `hub browse`
+    Then "open http://git.my.org/mislav/dotfiles" should be run

features/compare.feature

@@ -81,3 +81,11 @@ Feature: hub compare
     When I successfully run `hub compare anotheruser feature`
     Then there should be no output
     And "open https://github.com/anotheruser/dotfiles/compare/feature" should be run
+
+  Scenario: Enterprise repo over HTTP
+    Given the "origin" remote has url "git://git.my.org/mislav/dotfiles.git"
+    And I am "mislav" on http://git.my.org with OAuth token "FITOKEN"
+    And "git.my.org" is a whitelisted Enterprise host
+    When I successfully run `hub compare refactor`
+    Then there should be no output
+    And "open http://git.my.org/mislav/dotfiles/compare/refactor" should be run

lib/hub/commands.rb

@@ -693,7 +693,7 @@ module Hub
           "/#{subpage}"
         end
 
-        project.web_url(path)
+        project.web_url(path, api_client.config.method(:protocol))
       end
     end
 
@@ -724,7 +724,8 @@ module Hub
           end
         end
 
-        project.web_url "/compare/#{range.tr('/', ';')}"
+        path = '/compare/%s' % range.tr('/', ';')
+        project.web_url(path, api_client.config.method(:protocol))
       end
     end
 

lib/hub/context.rb

@@ -288,7 +288,7 @@ module Hub
         local_repo.remotes.find { |r| r.project == self }
       end
 
-      def web_url(path = nil)
+      def web_url(path = nil, protocol_config = nil)
         project_name = name_with_owner
         if project_name.sub!(/\.wiki$/, '')
           unless '/wiki' == path
@@ -298,7 +298,11 @@ module Hub
             path = '/wiki' + path
           end
         end
-        "https://#{host}/" + project_name + path.to_s
+        '%s://%s/%s' % [
+          protocol_config ? protocol_config.call(host) : 'https',
+          host,
+          project_name + path.to_s
+        ]
       end
 
       def git_url(options = {})