configure.ac: check for -lrt
configure.ac: check for -lrt

Needed when pgqd is built against libevent (--with-libevent)

overdrive3000/skytools,markokr/skytools,overdrive3000/skytools,tarvip/skytools,markokr/skytools,markokr/skytools,tarvip/skytools,overdrive3000/skytools,tarvip/skytools