net-mgmt/netmagis-*: update 2.3.0 -> 2.3.2

• Update PORTVERSION and distinfo for 2.3.2
• Drop PORTREVISION on netmagis-metro slave port
• Revise NO_ARCH handling, rely on setting it in netmagis-common if not already defined then set it to blank in netmagis-topo and netmagis-www where architecture specific files are packaged
• Strip binaries for netmagis-www

PR: 202709
Submitted by: Pierre David <pdagog@gmail.com> (maintainer)