cifs.upcall: fix manpage and comments

cifs.upcall: fix manpage and comments

The "cifs.resolver" key type has been changed to "dns_resolver". Fix
the comments at the top of cifs.upcall and the manpage accordingly.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@samba.org>
---
 docs-xml/manpages-3/cifs.upcall.8.xml |    4 ++--
 source/client/cifs.upcall.c           |    8 ++++----
 2 files changed, 6 insertions(+), 6 deletions(-)