* Try not to hardcode anything. Intoduce a $subtrees variable which
lists the CVS subtrees that need to be updated.
* Document all major variables and actions.
* Allow customization via the current environment (add some variables
which can be set to facilitate testing and running outside of
freefall).
* Do a fresh checkout of the sources every Sunday; previously this
was only a `make clean`; a fresh checkout makes sure occasional CVS
bogons don't mess anything up (requested by nik).
* Make $LOGFILE an absolute path so we don't end up with multiple log
files, each containing half of the story.
Approved by: nik
committed to the main (as opposed to ~wosch/cvs) CVS repository so
that committers can modify it without the assistance of (but, of
course, with the approval of) the webmaster and/or his lieutenant. It
may also serve as a starting point for web site mirrors' update
scripts.
Requested by: nik
Obtained from: freefall:~wosch/bin/myupdate
