New Feature: added ngx_http_lua_upstream_set_peer_addr() #11
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Hi agentzh.
This adds ngx_http_lua_upstream_set_peer_addr() to change upstream ip:port for #10.
I would appreciate it if you could run tests and merge this feature with your branch.
The syntax is similar to set_peer_down as follows:
syntax: ok, err = upstream.set_peer_addr(upstream_name, is_backup, peer_id, addr_value)
upstream.set_peer_addr("bar", false, 0, "10.10.10.10:80")