r6127: Eliminated all compiler warnings pertaining to mismatched "qualifiers". The

r6127: Eliminated all compiler warnings pertaining to mismatched "qualifiers".  The
whole of samba comiles warning-free with the default compiler flags.

Temporarily defined -Wall to locate other potential problems.  Found an
unused static function (#ifdefed out rather than deleted, in case it's
needed for something in progress).

There are also a number of uses of undeclared functions, mostly krb5_*.
Files with these problems need to have appropriate header files included,
but they are not fixed in this update.

oplock_linux.c.c has undefined functions capget() and capset(), which need
to have "#undef _POSIX_SOURCE" specified before including <sys/capability.h>,
but that could potentially have other side effects, so that remains uncorrected
as well.

The flag -Wall should be added permanently to CFLAGS, and all warnings then
generated should be eliminated.