plugins/python: don't copy router_name in py_uwsgi_route

No need to create a news string since uwsgi_route_api_func use it
for just a strcmp.

Reported by Coverity as CID #989251.
plugins/zergpool: fix a couple of memory leaks in add_zergpool_socket

Reported by Coverity as CID #971071, #971070.
plugin/python: fix a leak in symimporter_load_module

Reported by Coverity as CID #971058.
plugin/python: fix leak in uwsgi_file_loader

Reported by Coverity as CID #971055.
core: fix a couple of leaks in uwsgi_opt_load_dl

Reported by Coverity as CID #971049, #971050.
core/uwsgi: don't leak fd in flock related function

Reported by Coverity as CID #971047, #971048.
core/uwsgi: fix memory leak in signal_pidfile

Reportd by Coverity as CID #971046.
core/stats: fix memory leak in uwsgi_stats_pusher_setup

Reported by Coverity as CID #971039.
core/queue: close queue store after mmap()

Reported by Coverity as CID #971035.
core/protocol: fix leak in send_udp_message

By moving the allocation after some early returns in case of error.

Reported by Coverity as CID #971033.
core/mule: fix a memory leak in uwsgi_setup_mules_and_farms

Reported by Coverity as CID #971028.
core/legion: fix memory leak in wsgi_opt_legion_quorum

Reported by Coverity as CID #971024.
Merge pull request #177 from xrmx/coverity10

More issues reported by Coverity