bin/41159: new sed -c option to allow ; as a separator for b, t and : functions

[Cyrille Lefevre]

anyone to commit this PR ? thanks in advance.

purpose :

the current sed implementation can't handle the ; separator for
	b, t and : functions. this patch set add a new -g (gnu) option which
allow sed to parse such constructions.

PS : the last patch set also include PR#41190.

Cyrille Lefevre.
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