nginx-clojure-embed need be compiled with more built-in nginx c modules

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nginx-clojure-embed is a jar packaged with nginx dynamic libraries, so it makes debugging/testing java/clojure/groovy handlers very easy. But currently nginx-clojure-embed does not support some built-in nginx modules.

In this way, it still cannot be used for debugging/testing of handlers that use these modules at the same time.

So nginx-clojure-embed need be compiled with more built-in nginx modules. These built-in modules include

1. http-cache
2. http_ssi_module
3. http_upstream_hash_module
4. http_upstream_ip_hash_module
5. http_upstream_least_conn_module
6. http_upstream_keepalive_module

etc.

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Related to #269