Bump PORTREVISION for all consumers of the devel/poco.
In multimedia/nymphrpc add patch from upstream to support newer poco:
d56411046e
https://github.com/MayaPosch/NymphRPC/issues/9
security/clamfs: while here replace PORTVERSION with DISTVERSION and
remove GNU_CONFIGURE_MANPREFIX.
PR: 282219
Approved by: adridg