need to give old daemons time to die

[Guy Middleton <gamiddleton@math.waterloo.edu>]

Some of our machines are slow, and smtpserver sometimes sends a signal to
the old daemon, but then tries to bind to the SMTP port before the old
one dies.  A quick fix is to give it a few seconds to exit, but to be
safe we should really send another signal to make sure it's gone.

*** 1.2	1992/08/12 01:25:30
--- killprev.c	1992/11/05 22:41:56
***************
*** 34,42 ****
  		else if (c == getpid())
  			(void) printf("was about to commit suicide\n");
  		else if ((sig < 0 && killpg(c, -sig) == 0 && sig == -SIGTERM)
! 			 || (sig > 0 && kill(c, sig) == 0 && sig == SIGTERM))
  			printf("killed previous daemon%s = %d\n",
  				(sig > 0) ? ", pid" : "s, pgrp", c);
  		(void) fclose(fp);
  	}
  	if ((sig == 0 || sig == SIGTERM || -sig == SIGTERM)
--- 34,44 ----
  		else if (c == getpid())
  			(void) printf("was about to commit suicide\n");
  		else if ((sig < 0 && killpg(c, -sig) == 0 && sig == -SIGTERM)
! 			 || (sig > 0 && kill(c, sig) == 0 && sig == SIGTERM)) {
  			printf("killed previous daemon%s = %d\n",
  				(sig > 0) ? ", pid" : "s, pgrp", c);
+ 			sleep(5);	/* give process time to die */
+ 		}
  		(void) fclose(fp);
  	}
  	if ((sig == 0 || sig == SIGTERM || -sig == SIGTERM)