ports/security/courier-authlib incorrect runtime dependencies

[Rolandas Naujikas]

In Makefile.dep should be RUN_DEPENDS also, because the ports depends on
shared libraries, that should be installed to be run.

For example mail/courier-imap with option vpopmail will not run, because
it depends only in build time on courier-authlib-vchkpw. After package
built, if I install it, because it doesn't have run dependency on
courier-authlib-vchkpw it will not run (will not find required *.so file).

Rolandas Naujikas

P.S. Sorry for my English.