Patch versus version r11



1. SOCK_MAXCHAN (drv_sock.c) now set to (MAXVOIES)  This was set to 50, which was less than MAXVOIES, and the code was
accessing data off the end of this table.  This was causing strange problems.  After I made this change the gateway
function started working again.  If anyone was having trouble with xfbbd and RF radio connections, this change may
possibly fix their problem.
2.  Several minor changes designed to eliminate "Bad file descriptor" error messages.  These occurred at the time
of housekeeping due to a minor bug.  The messages actually turned out to be harmless, as far as I can tell.
3.  Only use the signal handler for signals that have functionality in the code.  This is a simplification
to prevent bugs.  Other signals are set to SIG_IGN.