[pkg-ntp-maintainers] Bug#793745: ntp fails to start

[Sven Ulland]

I believe this error is rather an artifact of the ntpd/ntpd.c patch in 
ntp_4.2.8p4+dfsg-3's debian/patches/ntpd-linux-caps-runtime.patch. That 
patch checks Linux capabilities by calling cap_from_text, but it does 
not include the CAP_IPC_LOCK capability, which is needed to make mmap(2) 
work; mmap is used by lower-level entity lookup routines, either in 
libnss or libc -- I haven't dug to the bottom of it yet, other than 
seeing that mmap fails.

Adding CAP_IPC_LOCK to the cap_from_text() call makes the user ID lookup 
mechanism work as it should.