The scheduler could crash when processing a Limit or LimitExcept

The scheduler could crash when processing a Limit or LimitExcept
directive (STR #728)

The lpq, lpr, and lp commands did not differentiate between the
server being unresponsive and the lack of a default printer (STR
#728)

The PAM checks in the configure script did not stop after the
first match (STR #728)

The cups-config man page was incorrectly placed in section 3
(STR #728)

git-svn-id: svn+ssh://src.apple.com/svn/cups/cups.org/trunk@4182 7a7537e8-13f0-0310-91df-b6672ffda945