[krbdev.mit.edu #7976] Client keytab does not refresh manually obtained ccaches

[Greg Hudson via RT]

The client keytab refresh mechanism only works for ccaches created by the 
GSS initiator from the client keytab.  There is also no easy way to look 
at a ccache and see whether it has a refresh timer on it, since we don't 
display ccache config entries in klist.

See also:

http://mailman.mit.edu/pipermail/kerberos/2014-July/020041.html