net.server_event: Fix some global accesses

Merge with 0.7

mod_proxy65: Fix for old-style closing of connections (another source of tracebacks with libevent enabled)

net.server_select: Fix calling method of some handler.close()s

Merge with 0.7

net.server_event: Improve and fix potential traceback in logging of new incoming connections

Merge with 0.7

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