v1.6.1: krb ticket path length broken in other places

[Phil Pishioneri <pgp@xxxxxxx>]

That old 24 character length of the kerberos ticket file path is 
hard-coded in a few other places:

./daemon/cparse.h:    char      ci_krbtkt[ 24 ];
./filters/apache/sparse.h:    char      si_krb5tkt[ 24 ];
./filters/apache/sparse.h:    char      si_krb4tkt[ 24 ];
./filters/apache2/sparse.h:    char     si_krb5tkt[ 24 ];
./filters/apache2/sparse.h:    char     si_krb4tkt[ 24 ];

I haven't checked yet whether they can also be increased to MAXPATHLEN, 
but it looks dicey.

-Phil