[PATCH 1.3] work around some annoyances with ab error handling

[Jeff Trawick <tr...@attglobal.net>]

(or consider this a bitch at the mess we call ab; just cleaning out some 
of my source trees of potentially useful changes)

if errno != 0, err() prints the errno string...  yet err() is called 
sometimes when errno is irrelevant; large-scale rework of error handling 
would be nice, but this at least helps a bit in the meantime

Re: [PATCH 1.3] work around some annoyances with ab error handling

["Roy T. Fielding" <fi...@gbiv.com>]

+1, though it would probably be better to add a parameter to err
to pass errno (or 0) rather than using the global in this way.

....Roy