Add netutil.FormatRemoteAddr() to avoid repeated net.TCPAddr.String()
allocations on the hot logging path.
- IPv4 addresses use a zero-allocation fast path (custom uint8->ASCII).
- IPv6 falls back to addr.String() with a 1024-entry LRU cache.
- Update logging.LogAccess and variable $remote_addr/$remote_port
getters to use the shared helper.
Eliminates net.JoinHostPort and net.IP.String from top allocators
when access logging is active.
xfy
9824ad5b57