rdr_pfx was not being free during server cleanup, leading to small memory
leak when "redir" argument was used on a server line (HTTP only).
This should be backported to every stable versions.
[For 2.6 and 2.7: the free should be performed in srv_drop() directly.
For older versions: free in deinit() function near the free for the
cookie string]
void srv_free_params(struct server *srv)
{
free(srv->cookie);
+ free(srv->rdr_pfx);
free(srv->hostname);
free(srv->hostname_dn);
free((char*)srv->conf.file);