Add support for /etc/rc.resume, so it calls
"rcorder -k resume" and runs scripts containing "KEYWORD: resume"
with single "resume" argument.
Working example is the port sysutils/cpupdate that defines
extra_commands="resume" to reload CPU microcode cleared
by suspend/resume sequence.
This change does nothing for a system having no scripts with
KEYWORD: resume.
PR: 227866
Differential Revision: https://reviews.freebsd.org/D15247
530d509906