kbdmap(5) names this ASCII control character "np". That is apparently "New Page", a fairly rare and non-standard name. Its standard name is "Form Feed", FF. The manual really should use that name.
ascii(7) also calls character 10 NL and 12 NP, fwiw. Fortunately the parser in kbdcontrol accepts LF|lf|NL|nl for character 10 and FF|ff|NP|np for character 12.
A commit references this bug: Author: emaste Date: Sat Jan 2 18:35:11 UTC 2016 New revision: 293055 URL: https://svnweb.freebsd.org/changeset/base/293055 Log: kbdmap.5: Use current names for ASCII control codes lf, ff, us Refer to the old names nl, np, ns as historical aliases. PR: 205776, 205778 MFC After: 1 week Sponsored by: The FreeBSD Foundation Changes: head/usr.sbin/kbdcontrol/kbdmap.5
A commit references this bug: Author: emaste Date: Wed Jan 6 21:47:49 UTC 2016 New revision: 293281 URL: https://svnweb.freebsd.org/changeset/base/293281 Log: Use standard name for ASCII LF and FF control codes PR: 205778 MFC after: 2 weeks Changes: head/share/man/man7/ascii.7 head/share/misc/ascii
A commit references this bug: Author: emaste Date: Sat Jan 9 01:01:05 UTC 2016 New revision: 293455 URL: https://svnweb.freebsd.org/changeset/base/293455 Log: MFC r293055: kbdmap.5: Use current names for ASCII control codes lf, ff, us Refer to the old names nl, np, ns as historical aliases. PR: 205776, 205778 Changes: _U stable/10/ stable/10/usr.sbin/kbdcontrol/kbdmap.5
A commit references this bug: Author: emaste Date: Wed Jan 20 16:41:01 UTC 2016 New revision: 294443 URL: https://svnweb.freebsd.org/changeset/base/294443 Log: MFC r293281: Use standard name for ASCII LF and FF control codes PR: 205778 Changes: _U stable/10/ stable/10/share/man/man7/ascii.7 stable/10/share/misc/ascii
Committed and merged