Proxy: fixed proxy_method to always add space.
Proxy: fixed proxy_method to always add space.

Before the patch if proxy_method was specified at http{} level the code
to add trailing space wasn't executed, resulting in incorrect requests
to upstream.

firebase/nginx,firebase/nginx,firebase/nginx,hy0kl/nginx,hy0kl/nginx,firebase/nginx,hy0kl/nginx