Fixed comment typo.
hostiles_flags_to_string(): use str_private() instead of static string.
hostiles_flags_are_bad(): removed HSTL_ODD_GUID from the list of bad flags.
search_results_process(): do not record last hop as hostile if hit was relayed.

When we identified a spam/evil query hit, make sure we do not mistakenly record
the last hop as the spamming host: if the hit was relayed via a GUESS server,
its coming from UDP does not identify the source of the hit!
Added hostile flags to identify hosts sending gibberish or non-UTF8 filenames.

These hosts are not necessarily hostile, but they are avoided for GUESS queries.
Attach push-proxies that are included in a /QH2 message to known servers.
download_request(): make sure to flag as G2 a server that responds well to G2.