Upstream: only call peer.free() if peer.get() selected a peer.


git-svn-id: svn://svn.nginx.org/nginx/trunk@5133 73f98a42-aea0-e011-b76d-00259023448c
Upstream: removed double-free workarounds in peer.free() methods.


git-svn-id: svn://svn.nginx.org/nginx/trunk@5134 73f98a42-aea0-e011-b76d-00259023448c