using -b over -h option from cli for bind address

I've also renamed all occurrences of options.host
to options.bind

lib/sinatra/base.rb

@@ -833,7 +833,7 @@ module Sinatra
     private
       def route(verb, path, options={}, &block)
         # Because of self.options.host
-        host_name(options.delete(:host)) if options.key?(:host)
+        host_name(options.delete(:bind)) if options.key?(:host)
 
         options.each {|option, args| send(option, *args)}
 
@@ -927,7 +927,7 @@ module Sinatra
         handler_name = handler.name.gsub(/.*::/, '')
         puts "== Sinatra/#{Sinatra::VERSION} has taken the stage " +
           "on #{port} for #{environment} with backup from #{handler_name}" unless handler_name =~/cgi/i
-        handler.run self, :Host => host, :Port => port do |server|
+        handler.run self, :Host => bind, :Port => port do |server|
           trap(:INT) do
             ## Use thins' hard #stop! if available, otherwise just #stop
             server.respond_to?(:stop!) ? server.stop! : server.stop
@@ -1040,7 +1040,7 @@ module Sinatra
     set :run, false                       # start server via at-exit hook?
     set :running, false                   # is the built-in server running now?
     set :server, %w[thin mongrel webrick]
-    set :host, '0.0.0.0'
+    set :bind, '0.0.0.0'
     set :port, 4567
 
     set :app_file, nil

lib/sinatra/main.rb

@@ -17,7 +17,7 @@ module Sinatra
         op.on('-e env')    { |val| set :environment, val.to_sym }
         op.on('-s server') { |val| set :server, val }
         op.on('-p port')   { |val| set :port, val.to_i }
-        op.on('-h addr')   { |val| set :host, val }
+        op.on('-b addr')   { |val| set :bind, val }
       }.parse!(ARGV.dup)
     end
   end

test/server_test.rb

@@ -22,7 +22,7 @@ class ServerTest < Test::Unit::TestCase
   setup do
     mock_app {
       set :server, 'mock'
-      set :host, 'foo.local'
+      set :bind, 'foo.local'
       set :port, 9001
     }
     $stdout = File.open('/dev/null', 'wb')

test/settings_test.rb

@@ -306,10 +306,10 @@ class SettingsTest < Test::Unit::TestCase
     end
   end
 
-  describe 'host' do
+  describe 'bind' do
     it 'defaults to 0.0.0.0' do
-      assert_equal '0.0.0.0', @base.host
-      assert_equal '0.0.0.0', @application.host
+      assert_equal '0.0.0.0', @base.bind
+      assert_equal '0.0.0.0', @application.bind
     end
   end