minor, work around deficiency in getopt that lacks support for literal negative numbers ... -1 on the command line is usually interpreted as the option -1. However in dseq we allow the increment to be negative and we don't intend to bother the user to specify the -- (end of options) separator.
minor, work around deficiency in getopt that lacks support for literal negative numbers ...
-1 on the command line is usually interpreted as the option -1.
However in dseq we allow the increment to be negative and we don't intend to bother the user to specify
the -- (end of options) separator.

Signed-off-by: Sebastian Freundt <1f0829204b3475c52f714f96be4e7b39a87b6e74@ga-group.nl>

rudimeier/dateutils,rudimeier/dateutils,rudimeier/dateutils