Add optional overload to the get_short and get_int functions
Rewrite packet handling for server browser
Fix bug in NAS server from 1fbec2f
Use str instead of bytearray

Fixes change I made in 97277fb
More overloads for util functions
Loop as long as there is enough data for a packet
Unpack signed to unsigned
Merge https://github.com/polaris-/dwc_network_server_emulator