Support SIGUSR1 in daemon mode
Support SIGUSR1 in daemon mode

In commit 7f62fb1 (Let SIGUSR1 trigger a reload, 2014-10-10), we added
support for reloading the data files by sending SIGUSR1 to an
interactive calcurse process. Add the same functionality to the daemon
mode.

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

lfos/calcurse,lfos/calcurse,lfos/calcurse