Let Automatiek vendor net-http and net-protocol

Allow target namespace to be an intermediate one with other constants
behind it (like `Net` in `Net::HTTP`).

Author: deivid-rodriguez

tool/automatiek/gem.rb

@@ -100,7 +100,9 @@ def namespace_files(folder)
         contents = File.read(file)
 
         contents.gsub!(/module Kernel/, "module #{prefix}")
-        contents.gsub!(/::#{namespace}/, "::#{prefix}::#{namespace}")
+        contents.gsub!(/#{prefix}::#{namespace}::/, "#{namespace}::")
+        contents.gsub!(/#{namespace}::/, "#{prefix}::#{namespace}::")
+        contents.gsub!(/(\s)::#{namespace}/, '\1' + "::#{prefix}::#{namespace}")
         contents.gsub!(/(?<!\w|def |:)#{namespace}\b/, "#{prefix}::#{namespace}")
 
         contents.gsub!(/^require (["'])#{Regexp.escape require_entrypoint}/, "require_relative \\1#{relative_require_target_from(file)}")