This reverts commit 7066486fbb.

LWS 3.2.x and 4.0.x are broken on ath79 and malta-be, (at least)

See https://github.com/warmcat/libwebsockets/issues/2008
and
https://github.com/openwrt/packages/issues/13085

Restore a functional 3.1 release until upstream release.

Signed-off-by: Karl Palsson <karlp@etactica.com>

3.2.x is formally "not maintained" and people should stick with 3.1.x
until a new release of the master branch occurs.  However, in reality,
3.2.1 has been released, with performance improvements and fixes.

Signed-off-by: Karl Palsson <karlp@etactica.com>

Drops an openssl deprecation patch applied upstream.

Changes since 3.0.0, the following list of websocket related features:
* gzip+brotli compression in the webserver
* threadpools
* string tokenizers
* http reverse proxies
* managed disk cache

Full changes at https://libwebsockets.org/git/libwebsockets/tree/changelog?id=89eedcaa94e1c8a97ea3af10642fd224bcea068f#n4

Tested on ath79, and classic usage of libwebsockets to provide
websockets support to a C application.

Signed-off-by: Karl Palsson <karlp@etactica.com>

Signed-off-by: Rosen Penev <rosenp@gmail.com>

Removed upstreamed patch.

Also added a patch to fix Travis.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Tested-by: Karl Palsson <karlp@etactica.com>