adding extended proxy support for http(s) client


git-svn-id: https://gnunet.org/svn/gnunet@33053 140774ce-b5e7-0310-ab8b-a85725594a96
extended proxy support for hostlist


git-svn-id: https://gnunet.org/svn/gnunet@33054 140774ce-b5e7-0310-ab8b-a85725594a96
change debug level


git-svn-id: https://gnunet.org/svn/gnunet@33055 140774ce-b5e7-0310-ab8b-a85725594a96