irc/znc: Update to 1.10.0
- Unbundle cctz, googletest (not enabled) and gtest-parallel (not enabled)
- Disable Argon support (unmaintained upstream)
- Some small changes to port Makefile
Changelog: https://wiki.znc.in/ChangeLog/1.10.0
PR: 287527
Reviewed by: dbaio (maintainer)