Exempt administrators from per-IP login delay

[computertech1012]

Hi,

This change makes administrator accounts bypass the server's per-IP login delay, matching the existing administrator exemption from the maximum-logins-per-IP limit.

The delay still applies to ordinary accounts. Invalid credentials and banned accounts are unchanged because the exemption is evaluated only after successful authentication. The administrator check is also evaluated before LoginsExceeded(), so administrator logins do not create or refresh the per-IP delay timestamp.

This helps trusted server-management, radio, and bot accounts recover when several legitimate clients share one public IP address, without weakening the delay for guests or ordinary users.

Tests performed on a clean Linux checkout:

• Built the Standard and Professional server binaries, JNI libraries, and Java test artifacts.
• Ran testAdminLoginDelayExemption five times against the patched Standard server.
• Interleaved all five runs with the existing testLoginDelay test to verify ordinary accounts remain protected.
• Repeated the same five-plus-five focused matrix with the Professional JNI client against the patched server.
• All 20 focused test runs passed.

@bear101, this is the narrower administrator-only approach discussed in #3440.

Thanks for reading!

[amirmahdifard]

@computertech1012 Thanks this is how it should behave