net-dns/acme-dns: fix setting capabilities in init script

The previous init script didn't set the capabilities correctly, leading to the daemon being unable to start due to missing permissions to listen on udp/53. This commit adds a new revised init script which sets the capabilities correctly (and which was successfully tested on a machine running acme-dns as daemon).

Signed-off-by: Adrian 'nex' Schollmeyer adrian.schollmeyer@fem.tu-ilmenau.de