sm: New option --ldapserver as an alias for --keyserver.
* sm/gpgsm.c (opts): Add option --ldapserver and make --keyserver an alias.
We should use "keyserver" for OpenPGP and thus it is better to allow
for "ldapserver" here - it is the same convention as now used in
(cherry picked from commit d6df1bf84969bf5f5781e33bc1c2f6cb2aee0093)
- Signed-off-by: Werner Koch <firstname.lastname@example.org>