Document the default Net timeout values by @toolmantim [GH fixes #269]

 * lib/net/{ftp,http,pop,smtp}.rb: added documentation for default values.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40014 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
doumentation by @toolmantim [GH fixes #270]

 * timeout.rb: Document Timeout::timeout 0 and nil argument behavior



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40015 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
documentation by @phiggins [GH fixes #263]

 * file.c: Alias File #path and #to_path.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40016 b2dd03c8-39d4-4d8f-98ff-823fe69b080e