- exponential spawning and SIGUSR1 were interacting a bit badly with each

other (while 1; kill -USR1 would quickly fill the scoreboard)
- reduce the need to call signal() for SIGUSR1, SIGPIPE, and SIGALRM
- properly mark all the signal related variables as volatile


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@78862 13f79535-47bb-0310-9956-ffa450edef68