david c6ca94dc43 Fix encoded_name_to_normal for the name ".". ...

When a DNS name was only "."; i.e., the first byte in its encoded
representation was 0, encoded_name_to_normal wouldn't null-terminate the
string. This caused multiple warnings
	Illegal character(s) in hostname -- replacing with '*'
as later code read from uninitialized memory. Now we null-terminate
whenever the function returns success, and treat "." as a special case
for which we retain the trailing dot.

This bug was found by Gisle Vanem, who wrote a patch to fix it. I added
some more error checking to the patch.

2012-01-08 04:41:58 +00:00

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