The json_status module serves the counters of the stub status module as a
JSON document instead of the plain text layout: active connections, the
accepted, handled and requested totals, and the reading, writing and waiting
figures.  Its single directive, json_status, is placed in the location that
is to answer with them.

This port only installs the module sources.  The module itself is built by
the nginx ports when their HTTP_JSON_STATUS option is enabled.