e1_input: Add VTY command to enable PCAP debug output
e1_input: Add VTY command to enable PCAP debug output

This command is also usable at run-time to dynamically
enable / disable e1 tracing on all active lines

Signed-off-by: Sylvain Munaut <349f318521b45672c77207abf1a5ed60eb011db1@246tNt.com>
Change-Id: I0b4251702aecd6721b9d63c320351ef6cb513454

osmocom/libosmo-abis,osmocom/libosmo-abis,osmocom/libosmo-abis