post-patch blues with db3, db4, db41

[Sean McNeil]

Hi,

There are post-patch targets for these ports that are causing issues
with the libraries built.  The target:

post-patch:
        @${REINPLACE_CMD} -Ee \
                's|-l?pthread|${PTHREAD_LIBS}|g' ${WRKSRC}/${CONFIGURE_SCRIPT}

causes the library to be linked with libpthread.so.  This is a
dependency that we do not want.  It will in turn cause issues with
nss_ldap and db doesn't use any threading.  It is thread safe, but that
doesn't mean it should be linked with pthread.

I took out that target from my build of db41 and all is well for me. 
With it in, nss_ldap ends up causing all sorts of bad things to happen
because it uses db41 (via openldap and sasl) and it in turn pulls in
pthread when it shouldn't.

Could this target be removed from the ports mentioned?

Cheers,
Sean