• Unconditionally define PORTREVISION in subports to skip unneccessary bump slaves by master port touching
• Pass master's CONFIGURE_ARGS to slaves
• Option to select mail/opensmtpd[-devel] as build/run dependency (and corresponding libasr via this)
• Pass pkgconfig dependency only to subports which need it.
• Adjust dependencies in subports

Submitted by: myself
Reviewed by: adamw, gahr
Approved by: adamw, gahr, miwi (mentor, implicit)
Sponsored by: milk and cookies
Differential Revision: https://reviews.freebsd.org/D6607