Another source of snprintf/vsnprintf code

Came across this offhand remark on another mailing list:

>  2. The code for substitute versions of snprintf() and vsnprintf(),
>     for systems without native versions has been replaced.  nmh
>     now uses the version of these routines taken from the Apache
>     web server code.

Hmm.  I don't know how bulletproof the snprintf/vsnprintf code we have
is, but it might be worth comparing what Apache is using to see if
theirs is better (and if they have a compatible copyright...).
        regards, tom lane