Merge pull request #361 from mdelagralfo/git-credential-fix

fixing git credential helper for GitHub Enterprise

script/boxen-git-credential

@@ -25,8 +25,11 @@ require "boxen/config"
 config = Boxen::Config.load
 input  = $stdin.read
 attrs  = Hash[input.split($/).map { |l| l.split("=") }]
+# find GitHub or GitHub Enterprise host
+ghhost = URI(config.ghurl).host
 
-if command == "get" && attrs["host"] =~ /(^|\.)github\.com$/
+host_exp = Regexp.new "(^|\.)" + Regexp.escape(ghhost)
+if command == "get" && host_exp.match(attrs["host"])
   puts "username=#{config.token}"
   puts "password=x-oauth-basic"
 else