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From: Maxim Ignatenko <gelraen.ua@gmail.com>
Date: Sat, 24 Dec 2011 19:29:24 +0200
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To: Warner Losh <imp@bsdimp.com>
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Cc: freebsd-rc@freebsd.org
Subject: Re: conf/163508: [rc.subr] [patch] Add &quot;enable&quot; and
 &quot;disable&quot; commands to rc.subr
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>=C2=A0If the 5% of cases are when someone has done something complicated t=
o the rc.conf file, then I don't care: they won't use this interface and we=
 can detect this case and do nothing.

Now I don't see how to distinguish cases when ${rcvar} set to default
value in rc-script and when it's set in other file in some not obvious
way.