net/libzmq4: Update to 4.0.5

• Update to 4.0.5
• Add LICENSE_FILE
• Sort Makefile sections
• Verbose'ify build
• Reduce diffs between net/libzmq3 [1]

[1] NOTE: OpenPGM is now a DEFAULT option in net/libzmq3

Changes:

• https://github.com/zeromq/zeromq4-x/blob/v4.0.5/NEWS

While I'm here:

• Bump PORTREVISIONS to chase shared library version change
• czmq: Verbose'ify czmq build
• czmq: Use install-strip to strip shared library

PR: 197407