lbdb @0.48.1: create a port variant to build the m_mu module

[tweinbrenner]

If you want to use lbdb with mu, you need the m_mu module, which isn't built by default.

I suggest adding the following to the Portfile to create a variant using mu:

--- Portfile.orig	2021-04-05 13:14:56.000000000 +0200
+++ Portfile	2021-04-05 13:15:23.000000000 +0200
@@ -64,6 +64,11 @@
     depends_lib-append      port:p${perl5.major}-perl-ldap
 }
 
+variant mu description { Add support for mu} {
+    configure.args-append   --with-mu
+    depends_run-append      port:mu
+}
+
 livecheck.type      regex
 livecheck.url       ${master_sites}
 livecheck.regex     ${name}_(\[0-9.\]+)${extract.suffix}