net/libwebsockets: Update to 4.3.2

Adjust configuration options to closer match other distributions and
also upstream's recommendations. Mosquitto also requires
LWS_WITH_EXTERNAL_POLL to be enabled when linked with this library.

Enable following options:
LWS_WITH_DISKCACHE, LWS_WITH_FTS, LWS_WITH_RANGES, LWS_WITH_THREADPOOL
and (LWS_WITH_EXTERNAL_POLL via MQTT option). Use SHA1 via OpenSSL
(LWS_WITHOUT_BUILTIN_SHA1)

While at also adjust .cmake and .pc files to properly report version

Changelog: https://github.com/warmcat/libwebsockets/blob/v4.3.0/changelog
https://github.com/warmcat/libwebsockets/compare/v4.3.0...v4.3.2

PR:		262552
Reported by:	Leo Schneider <ttkdroid@gmail.com>
Tested by:	Rod Morgan <rmorgan@portmorgan.com>