Bug 949939: Include <unistd.h> for sysconf() on HP-UX. r=wtc.
Bug 949939: Include <unistd.h> for sysconf() on HP-UX. r=wtc.

thespooler/nss,thespooler/nss,thespooler/nss,thespooler/nss,thespooler/nss,thespooler/nss,thespooler/nss