SimpleLink restart invalidates all sockets.
Listeners are restarted, outgoing connections are closed.

PUBLISHED_FROM=15567dfb822bffbd44d39ba0e69a7ac64fd7a1c8

cesanta/mongoose#677

PUBLISHED_FROM=4b62bdefac08fa3bedf511dc4d6f7463af3325fc

PUBLISHED_FROM=1599cf1d06c8f177918cbcf574c28c9e93d56d39

PUBLISHED_FROM=89b978c02be2f10eb930ff13673d45249fd67763

PUBLISHED_FROM=dbfcfa91ad85d6447726d0d7e9fe15709f4c4646

PUBLISHED_FROM=2dd69a5db6ca56215726b563e1551c683f21a768

PUBLISHED_FROM=bdaeed6628ffb544e31d7fd59475f3a2e78c2967

PUBLISHED_FROM=2daba7380508df24d909f922c5009286b4d8e7cf

PUBLISHED_FROM=3b4cbc497c4a0eee2d46f561c0717415ca85c242

Domain name verification feature was added in NWP service pack
(reported version: 2.6.0.5). Older versions do not support it.
There's not much we can do about it, so we just ignore the error.

PUBLISHED_FROM=9495250de1945aae4f2bdf7dddcd7bf1248e24c2

Frees up ~19KB RAM:

Before:
  Code size: 210616
  RAM at startup: 48636 total, 34472 free
  RAM after sys init: 15024 free

After:
  Code size: 195784
  RAM at startup: 65096 total, 52980 free
  RAM after sys init: 34116 free

PUBLISHED_FROM=32a9cb8fb6d75cf428bc3548dd5684ce6e52c508

PUBLISHED_FROM=b4062780d22be37acdbecd86e5951245e2908ff8

PUBLISHED_FROM=7e5fc4da88069a6193d911660f522b43ed1a5d40

PUBLISHED_FROM=9d4ab680fa672690735b827f56e135330f72beed

PUBLISHED_FROM=9d4ab680fa672690735b827f56e135330f72beed

PUBLISHED_FROM=171b25e15cad2c87eb40a8123fe8ea07e34c41f7

PUBLISHED_FROM=e6de3b3747a1cd79c3930c2640fadc8356ffed61

/sys/mcuimg.bin is just another file on SLFS, no reason to give it
special treatment. Preserve backward compatibility with old bundles:
translate sys_mcuimg.bin -> /sys/mcuimg.bin

PUBLISHED_FROM=be89a3d9785046f09279fef9e2bb6604eeaa576e

PUBLISHED_FROM=61b87fcee909241d5bdf2ba7407003c0c3cfbd72

PUBLISHED_FROM=3a14579dabba4088e54350945dc17fd6ebb0d700

SimpleLink sockets are suffciently different from BSD that all the
ifdefs have become too messy to warrant a separate net_if
implementation. As part of this we also implement proper async connect
support.

Added MG_F_SSL to identify SSL-enabled connections in a generic way,
since SSL state can be different depending on the implementation.

PUBLISHED_FROM=9cdb8c880b90683e4a26b972cf439d47d6f60917

PUBLISHED_FROM=faf0beb7545eb426c941fc366b6f87667723eb4c

SL requires cert and key to be separate files in DER format.

Date verification is disabled for now.

PUBLISHED_FROM=7d76150ed356140728a1e5fd82d8a0456347b7dc

PUBLISHED_FROM=274a19d6988002fb029e614bffea4083002324a1

PUBLISHED_FROM=f8e052f1a256f671de133135901b509d39608a82

PUBLISHED_FROM=db7254b5bf25961a700cbce954ef02d41b176500

Make restful_server and netcat examples compilation tests:
 - netcat doesn't use HTTP, compile it with MG_DISABLE_HTTP
 - restful_server doesn't use websocket, compile it with
   MG_DISABLE_HTTP_WEBSOCKET

h/t @labourcier, cesanta/mongoose#665

PUBLISHED_FROM=4494ac3cbd81e8314beb557ab301b4b44c4afb89

PUBLISHED_FROM=996721b6d28ee25fcfcb514d716552c4afa238e1

PUBLISHED_FROM=cec68bab53fc81b4085b81fba0c52e0c42b09f0f

PUBLISHED_FROM=1562c629ce08004a5243a61eed79e1c3161f1268

PUBLISHED_FROM=9fb2260cd76ae30b51db02053f4d2debf4cdf900

PUBLISHED_FROM=309be4a56754250406dd48f1abd30b68776f5c7e

PUBLISHED_FROM=da22d5ea0aa366d7cb9bba838f8e173ae0178f5e

PUBLISHED_FROM=80e77fda1c358294f251ca77d3dd64e8ca9160e5

`v7_mk_undefined()` and `v7_mk_null()` are left unchanged, but marked
deprecated, and `V7_UNDEFINED` and `V7_NULL` are public now.

Xtensa code size with instrumentation: 590400 -> 590432, i.e. 32 bytes.
Xtensa code size without instrumentation: 530848 -> 531760, i.e. 912
bytes.

As objdump reveals, inside v7.c, `v7_mk_number` and others are inlined,
so the extra v7 argument is eliminated; outside of v7.c it's obviously
not inlined.

----

Also, v7_get_int() is added, which currently just casts stored double
value to int

PUBLISHED_FROM=e984b7308faf2380b3de388f238e0fae0aea545d

PUBLISHED_FROM=be604dc6b3650c78daaa02ea4db8cd067069b5e1

 * Add TI compiler
 * Remove cc3200prog, we don't use it
 * Update to Xenial (new Ubuntu stable release).
   It has ARM toolchain in the repos too, which is nice (no more PPA).

PUBLISHED_FROM=57d6650b438c5665023346abefbc953263e3f87b

cesanta/mongoose#573

PUBLISHED_FROM=687722f0dbc3c49e6691e01e0d0b1ab2d181bd2f

PUBLISHED_FROM=f00b94cabc2a89d27d5bc78d68d67db0930811b4

cesanta/mongoose#653

PUBLISHED_FROM=a676dbce6d04b78ca316a4601e9cbb676ecc88d2