Merge branch 'metrics-typo' into 'master'

Fix typo in gitlab-workhorse header

See merge request !5891

GITLAB_WORKHORSE_VERSION

@@ -1 +1 @@
-0.7.8
+0.7.10

doc/install/installation.md

@@ -397,7 +397,7 @@ If you are not using Linux you may have to run `gmake` instead of
     cd /home/git
     sudo -u git -H git clone https://gitlab.com/gitlab-org/gitlab-workhorse.git
     cd gitlab-workhorse
-    sudo -u git -H git checkout v0.7.8
+    sudo -u git -H git checkout v0.7.10
     sudo -u git -H make
 
 ### Initialize Database and Activate Advanced Features

lib/gitlab/middleware/rails_queue_duration.rb

@@ -11,7 +11,7 @@ module Gitlab
       
       def call(env)
         trans = Gitlab::Metrics.current_transaction
-        proxy_start = env['HTTP_GITLAB_WORHORSE_PROXY_START'].presence
+        proxy_start = env['HTTP_GITLAB_WORKHORSE_PROXY_START'].presence
         if trans && proxy_start
           # Time in milliseconds since gitlab-workhorse started the request
           trans.set(:rails_queue_duration, Time.now.to_f * 1_000 - proxy_start.to_f / 1_000_000)

spec/lib/gitlab/middleware/rails_queue_duration_spec.rb

@@ -22,7 +22,7 @@ describe Gitlab::Middleware::RailsQueueDuration do
       end
 
       it 'sets proxy_flight_time and calls the app when the header is present' do
-        env['HTTP_GITLAB_WORHORSE_PROXY_START'] = '123'
+        env['HTTP_GITLAB_WORKHORSE_PROXY_START'] = '123'
         expect(transaction).to receive(:set).with(:rails_queue_duration, an_instance_of(Float))
         expect(middleware.call(env)).to eq('yay')
       end