Easier support multiple serial ports

v1.4.5 - 05/04/14 - Ron Curry, InSyte Technologies
	- ser2sock - Rewrote init.d script to easily accomodate multiple
instances
	and added additional error checking and reporting.
	- ser2sock.c - Added "-P" option to allow optionally specify PID
pathname
	  to better support running mulitple instantiations via scripts.

	  Prior to this  ser2sock would simply overwrite any previous PID file
in
	  /var/run
	- ser2sock.c - Added code to delete PID file apon exit
	- ser2sock.c - Changed logic which caused reading of a potentially non-
	  existent default config file prior to reading command line arguments

	  and prior to a specified config and fixed error reporting.
	  Now it only read the correct file once after considering cmdline args
	- ser2sock.c - Added "PID_FILE" keyword/option to config file support
	  Not needed for current init.d support but may be useful to some
	- Added trivial code to delete the /var/run/<PID_FILE> upon exit.
	- ser2sock.c - Added several additional syslog write to aid in
debugging
	- ser2sock.c - Changed ser2sock version to 1.4.5 to reflect above
changes
	  Version 1.4.5 should remain fully compatible with 1.4.4 behavior