Fix user profile link routing for Firefox

Gemfile

@@ -29,6 +29,7 @@ gem 'virtus',               '~> 1.0.1'
 gem 'warden',               '~> 1.2.3'
 gem 'pundit',               '~> 0.3.0'
 gem 'rack-robustness',      '~> 1.1.0'
+gem 'rack-rewrite',         '~> 1.5.0'
 
 group :development do
   gem 'quiet_assets',   '~> 1.0.1'

Gemfile.lock

@@ -189,6 +189,7 @@ GEM
     rack (1.5.2)
     rack-protection (1.5.0)
       rack
+    rack-rewrite (1.5.0)
     rack-robustness (1.1.0)
     rack-test (0.6.2)
       rack (>= 1.0)
@@ -359,6 +360,7 @@ DEPENDENCIES
   pry-rails (~> 0.3.2)
   pundit (~> 0.3.0)
   quiet_assets (~> 1.0.1)
+  rack-rewrite (~> 1.5.0)
   rack-robustness (~> 1.1.0)
   rails (= 4.1.5)
   rake (~> 10.0.4)

config/application.rb

@@ -42,6 +42,12 @@ module Asciinema
       g.ensure(true) { |ex| env['rack.errors'].write(ex.message) }
     end
 
+    # It seems some browsers (Firefox) use encoded "~" character which for
+    # unknown reason isn't properly decoded by rack and/or Rails router.
+    config.middleware.insert_before(Rack::Lock, Rack::Rewrite) do
+      rewrite /%7E(.+)/i, '/~$1'
+    end
+
     config.action_mailer.default_url_options = { protocol: CFG.scheme, host: CFG.host }
 
     if CFG.smtp_settings