#2 --unpad=paren not working

[Thomas Dorner]

When I try to add the "other option" --unpad=paren I
get an "option error". The whole option set (which I
copied from a script used elsewhere with the C++
version of AStyle) is
--style=ansi
--indent-switches
--indent-labels
--indent-namespaces
--pad=oper
--unpad=paren
--one-line=keep-blocks
--convert-tabs
--mode=c

The option seemed to appear in one of the newer version
of AStyle, AStyle 1.15.3 doesn't know it.
The rest worked good.

So some documentation about the supported and
unsupported options would be nice as well.