* Makefile.am: Add automake conditionals to symlink gpgkeys_ldaps to
gpgkeys_ldap when needed.
* gpgkeys_ldap.c (main): Add support for LDAPS and TLS connections.
These are only useful and usable when talking to real LDAP keyservers.
Add new "tls" option to tune TLS use from off, to try quietly, to try
loudly, or to require TLS.