In SDK 1.2.0 TI decided to stop resetting NWP before sl_Start, which in
practice means that sl_start will hang on subsequent runs after the first.

See this post for details and suggested solution:

https://e2e.ti.com/support/wireless_connectivity/simplelink_wifi_cc31xx_cc32xx/f/968/p/499123/1806610#1806610

However, since they don't provide OS_debug variant of simplelink.a and
adding another project dependency will complicate our demo even more,
we just take the required bit of code.

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Socket type is unsigned int on windows.

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Mg_hello is a simpler example for CC3200
File upload form is served on / if index.html does not exist
and always available on /upload

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Closes cesanta/smart.js#119

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And add the build to the CI.

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cesanta/mongoose#644, h/t @spuschhof

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It conflicted with Workspace service

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It'll be used for MSP432 as well

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Functions decl must follow comment to be correctly documented

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Doesn't actually work yet, but bits common with CC3200 (SimpleLink) are
moved out.

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Now it can talk to backend as well to the demo device: `LCD.AddLine`,
`LED.Set`, `LED.Get`.

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And only define bits that we need afterwards.

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1) It's broken; most likely in more ways than one
2) It doesn't make much sense as long as we maintain MG_EV_POLL and
   have to traverse the list of connections anyway.
3) In Mongoose, simplicity trumps performance.

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Factor out MG task for clarity and ease of reuse.

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Explicitly loosen them on the "big" platforms.

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This allows the bazel `BUILD` file to coexist on case insensitive
filesystems such as on OSX.

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