mausezahn.8: minor edits to improve format

Signed-off-by: Jon Schipp <jonschipp@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
mausezahn: bind to IP address in interactive mode

Adds new option ``-l'' that can be used to set mausezahn's
listen address to bind to an IP of choice. e.g.

mausezahn -l 127.0.0.1 -x

Signed-off-by: Jon Schipp <jonschipp@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
mausezahn: Increase buffer size for listen address string

Commit 2de653340c ("mausezahn: bind to IP address in interactive mode")
introduced mz_listen_addr of size 15 to hold the IP address to bind to.
Since an address can be maximum 15 characters long, this doesn't account
for the terminating '\0'. Fix this by increasing the buffer size to 16.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>