Fix void function returning a value in the configure script
use allow_severity/deny_severity on Solaris, too
allow SIGINT in foreground mode
break in wrong place in lookup_tbl
syslog adds a newline if one is not present, msg_out should do the same when
output is not going to syslog
bump max number of threads to 128
fix typo
don't ignore SIGBUS/SIGSEGV/SIGFPE