rtspconnection: also allow POST before GET
Don't only allow GET and then POST request to setup tunneling over HTTP but also allow POST and then GET. Fixes https://bugzilla.gnome.org/show_bug.cgi?id=732459
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Don't only allow GET and then POST request to setup tunneling over HTTP but also allow POST and then GET. Fixes https://bugzilla.gnome.org/show_bug.cgi?id=732459