fcm-rpmbuild: support adding `etc/fcm/*` from a site specific project.
r4906 Happy New Year.
r4916 LANG=en_GB: only set if this locale is available.
r4918 user configuration file is now searched from `$HOME/.metomi/fcm/`.
r4920 fcm make: reduce memory footprint for dumping the run time context.
r4926 fcm make: build: create directory of target triggers.