sysinfo['Computer'] returns IP address not hostname on Linux sessions

[bcoles]

rapid7/mettle#239

On Meterpreter sessions on Windows session.sys.config.sysinfo['Computer'] returns the system hostname, whereas on Linux the host IP address is returned instead.

msf6 exploit(multi/handler) > 
[*] Sending stage (3045348 bytes) to 192.168.200.202
[*] Meterpreter session 1 opened (192.168.200.130:1337 -> 192.168.200.202:41368) at 2022-11-22 07:28:51 -0500

msf6 exploit(multi/handler) > sessions

Active sessions
===============

  Id  Name  Type                   Information             Connection
  --  ----  ----                   -----------             ----------
  1         meterpreter x64/linux  user @ 192.168.200.202  192.168.200.130:1337 -> 192.168.200.202:41368 (192.168.200.202)

msf6 exploit(multi/handler) > sessions -i 1
[*] Starting interaction with 1...

meterpreter > sysinfo
Computer     : 192.168.200.202
OS           : Ubuntu 22.04 (Linux 5.15.0-53-generic)
Architecture : x64
BuildTuple   : x86_64-linux-musl
Meterpreter  : x64/linux
meterpreter >