Rework handling of I/O via select() to use correct fd_set type instead of int for fd sets.

Some code that was maintaining an fd_set with only a single fd was replaced
       with just the fd as int, which can be added to the global fd_set as needed.
       More testing is required for less usual configurations such as host TCP/UDP/IP
       and direct ethernet (packet filter or NIT) I/O.

	modified:   src/common.c
	modified:   src/ether.c
	modified:   src/inet.c
	modified:   src/initkbd.c
	modified:   src/kbdsubrs.c
	modified:   src/keyevent.c
	modified:   src/main.c
	modified:   src/osmsg.c
	modified:   src/rawrs232c.c
	modified:   src/rpc.c
	modified:   src/rs232c.c
	modified:   src/tty.c
	modified:   src/uraid.c
	modified:   src/xinit.c

src/main.c

@@ -55,6 +55,7 @@ static char *id = "$Id: main.c,v 1.4 2001/12/26 22:17:03 sybalsky Exp $ Copyrigh
 
 #ifndef DOS
 #include <sys/file.h>
+#include <sys/select.h>
 #endif /* DOS */
 
 #include <setjmp.h>
@@ -358,7 +359,7 @@ int main(int argc, char *argv[])
   char *envname;
   extern int TIMER_INTERVAL;
   char keytyped[255];
-
+  extern fd_set LispReadFds;
 #ifndef NOFORN
   if (dld_find_executable(argv[0]) == 0) {
     perror("Name of executable not found.");
@@ -532,6 +533,8 @@ int main(int argc, char *argv[])
 
   strcpy(keytyped, keystring);
 
+  FD_ZERO(&LispReadFds);
+
 #ifndef NOETHER
   init_ether(); /* modified by kiuchi Nov. 4 */
 #endif          /* NOETHER */