calcurse-caldav: fix -x argument
calcurse-caldav: fix -x argument

The optional argument to -x must be given as "-xical" (without a space).

Partly addresses GitHub issue #177.

Signed-off-by: Lukas Fleischer <c9ca73f8336dcfb037ec2c2abf52d80a6847a5cd@calcurse.org>

lfos/calcurse,lfos/calcurse,lfos/calcurse