cnbugs 5725149546 Fix v3 parser: scan for numeric fields (IPv6 field position varies) ...

The user's OpenVPN 2.5.11 outputs CLIENT_LIST with 13 tab-separated
fields:
  CLIENT_LIST CN RealAddr VPNAddr IPv6(empty) (empty) BytesRecv
              BytesSent ConnectedSince (time_t) Username ClientID
              PeerID Cipher

But OpenVPN 2.6+ drops the IPv6 and Cipher fields (11 columns), and
some versions include 'Connected Since (time_t)' which moves all
positions.

Solution: parse by content type, not position:
  - parts[0] = 'CLIENT_LIST'
  - parts[1] = CN (string, may be empty)
  - parts[2] = RealAddr (string with ':')
  - parts[3] = VPNAddr (IP, may be empty)
  - parts[4..] = scan for first pure-numeric field → BytesRecv
  - BytesRecv+1 = BytesSent
  - BytesRecv+2 = ConnectedSince

Verified against the user's real status.log:
  CN=test RealAddr=123.118.73.196:17564 VPNAddr=10.8.0.2
  bytesIn=629025 bytesOut=539217

2026-08-10 00:22:02 +08:00

..

manager.go

Fix v3 parser: scan for numeric fields (IPv6 field position varies)

2026-08-10 00:22:02 +08:00