Using smbclient tar -X without -r allows you to use multiple exclude
files.  If smbclient is compiled without HAVE_REGEX_H, using smbclient
tar -rX only uses the first exclude argument; the rest are silently
ignored.

The submitted patch adds a new function mask_match_list() that calls
mask_match() on each entry of cliplist[], returning TRUE if at least
one matches.  This allows smbclient tar -Xr to support multiple exclude
arguments.  (In the HAVE_REGEX_H case I presume the user can build a
single compound regex using "|" to match multiple names.)

This patch adds the new function in lib/util.c.  Alternatively, the
same function could be static and included directly in client/clitar.c
(like clipfind()).  (I assume I don't need to patch include/proto.h
since that is auto-generated.)