Fix clang warning, incorrect comment about IPv6, and apparent typo in log buffer size

clang gives a warning about the address of an array mid-way through a structure always being non-NULL. AFAICT, this is true, so I've disabled the check.

A comment about an IPv6 address string incorrectly refers to an IPv4 address format.

A log buffer is sized 10024 rather than 10240.

I'll post a branch soon with fixes to these.