*/*: Bump after update devel/poco

Bump PORTREVISION for all consumers of the devel/poco.

In multimedia/nymphrpc add patch from upstream to support newer poco:
https://github.com/MayaPosch/NymphRPC/commit/d56411046e06ec33ec8e81f05aa568c28380a679
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