dbootstrap changes: execlog

[Adam Di Carlo <adam@onshore.com>]

My pal Mike has added a new command, execlog, in util.c.  We use this
instead of system in most cases -- it redirects command stdout and
stderr to syslog (which, in unrelated news, isn't working for me).
Some commands are interactive -- they use boxsuspend and boxresume
around their calls, and still use system.

Anyhow, this should mean the end of commands scribbling all over the
dbootstrap curses screen.

BTW, utility function, for instance, now in main.c, should be moved to
util.c.

-- 
.....Adam Di Carlo....adam@onShore.com.....<URL:http://www.onShore.com/>