remove leftover comparison from when there was more than one proxy setting

git-svn-id: http://libtorrent.googlecode.com/svn/trunk@10060 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
fixed typo

git-svn-id: http://libtorrent.googlecode.com/svn/trunk@10061 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
removed left-over unused variables

git-svn-id: http://libtorrent.googlecode.com/svn/trunk@10062 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
apparently PYTHON_EXTRA_LDFLAGS is for internal python use only. fix m4 script

git-svn-id: http://libtorrent.googlecode.com/svn/trunk@10063 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda