more test91 tweaks and some c-ares stuff

                                  Changelog

Daniel(2 February 2004)

- curl_version() now includes c-ares version info, and curl_version_info() now

  returns a struct with version SECOND that also includes that info.

- We are now officially using c-ares for asynch name resolves. c-ares is the

  new library, based on the existing ares but with an extended and slightly

  modified API.

- Dirk improved the ares timeout code, and now we also include the ares error

  string when we fail to resolve a name.

- Another tweak to make test case 91 run fine. Now we have another bit on a

  connection that is set true if the connection is marked for 'retry'. That

  makes the connection get closed and re-opened and the HTTP-done code must

  not complain on the fact that no data was received.

- Based on Dirk Manske's patch, I modified the name resolving with ares to

  feature a timeout for really slow lookups. It now defaults to 300 seconds,

  but is now adjusted to the CONNECTTIMEOUT/TIMOUE timeouts if one of them