Misc fixes to eliminate problems at exit (and other things)

Misc fixes to eliminate problems at exit (and other things)

	- changed storeDirCloseSwapLogs() to take a 'reopen' arg.
	  if not set, we don't reopen the logs for writing again.
	- added FD_CLOSING flag to avoid recursive calls to comm_close().
	- added 'non_peers' structure to keep stats on offendors, instead
	  of logging every bad reply.