Rationale: this is the optimisation to make JS FFI-ed API
work nicer. We don't have strucuture introspection now,
and do not generate offsets automatially. Thus, using a
stable well-known location of the parsed message body is
better, in case of number of HTTP headers macro changes.

PUBLISHED_FROM=55bf25ac77060a9c81dfecd6601f037562530801

Remove the specialized URI parser, clean up code a bit.

Fix parsing of URIs with IPv6 hosts (http://[2001:2:3::4]:567/)

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PUBLISHED_FROM=93fe1cc2c5e2513509511a81e5919cbd37056b10

PUBLISHED_FROM=39a1c2a271c5cd961670e11c830105c17ba0b2e4

This event is sent at the end of the request

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PUBLISHED_FROM=73ef8ae768585d3c204e6e022848f49e8f4a8de2

This is the variant of MG_EV_SSI_CALL with context of the SSI call being
processed in addition to the tag argument. Specifically, call handler
now gets access to the HTTP request and the name of the file being processed.

MG_EV_SSI_CALL is preserved for backward compatibility.

PUBLISHED_FROM=eeea7487c062505abdb23b6f64994ff7a6b60ff8

PUBLISHED_FROM=e9a4e5c7b4a1d03b93a2a79e29de19e60e919929

A way to serve a single, specific file as opposed to the hairy monster
that is mg_serve_http.

PUBLISHED_FROM=6ed1bc487b9d41d212a5907337182f23b040aecf

PUBLISHED_FROM=5cd78790a03580aa23dd3d2d8b825ad449083cc2

Now JS is controlled with a make variable as opposed to a proproc define.

This allows skipping compiling a whole bunch of files when JS is
disabled, e.g. whole freezing step on ESP, or compiling v7.c on CC3200
which takes a while only to be discarded in its entirety later.

Var name is SJ_ENABLE_JS (note change from disable logic to enable to be in line with other stuff). Default is 1, meaning JS is enabled.

Also changed clubby knob in the same way: SJ_ENABLE_CLUBBY, default is 1 as well.

PUBLISHED_FROM=105277e9536e423d6363a51ff9acea9550a9c496

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