Use socklen_t (defined for platforms that don't provide socklen_t...)

Use socklen_t (defined for platforms that don't provide socklen_t...)

cups/http-private.h:
    - Define socklen_t to int on IRIX.

scheduler/client.c:
    - cupsdAcceptClient(): Use socklen_t.

scheduler/dirsvc.c:
    - cupsdUpdateCUPSBrowse(): Use socklen_t.

scheduler/cups-lpd.c:
    - main(): Use socklen_t.

git-svn-id: svn+ssh://src.apple.com/svn/cups/cups.org/trunk@4759 7a7537e8-13f0-0310-91df-b6672ffda945