disable SSL renegotiation (CVE-2009-3555)

fix posix_memalign() error handling

nginx sent gzipped responses to clients those do not support gzip,
if "gzip_static on" and "gzip_vary off"; the bug had been introduced in r3250

resolver fixes:

*) fix memory leak in resolver
*) fix resolver cache rbtree comparison
*) fix segfault in resolver:
   ngx_resolve_name_done() and ngx_resolve_addr_done() did not delete
   contexts from a resolver node waiting list.
*) fix "PTR ." case in address resolver
*) add quotes in an error message,
*) fix resolving an empty name (".")
*) use ngx_resolver_alloc() instead of ngx_resolver_calloc()
   since all fields are filled

server name related merges:

*) If .domain.com, .sub.domain.com, and .domain-some.com were defined,
   then .sub.domain.com was matched by .domain.com: wildcard names hash
   was built incorrectly due to sorting order issue of "." vs "-".
   They were sorted as
       com.domain  com.domain-some  com.domain.sub
   while they should be sorted as
       com.domain  com.domain.sub   com.domain-some
   for correct hash building

*) test space between "~" and regex in server_name and invalid_referers

*) do not run regex for empty host name since regex always fails in this case,
   the bug had been introduced in r2196

fix building by gcc45