Fix crash when calling QObject::disconnect for QNetworkReplyWrapper

Fix it by watching the QNetworkReply's destroyed() signal and avoid the dangling pointer
instead. The QNetworkReply doesn't need to be aborted in this case anyway.

Issue #11252: https://github.com/ariya/phantomjs/issues/11252
Upstream bug: https://bugs.webkit.org/show_bug.cgi?id=116035
Netsniff.coffee example should exit with an error when fails to load the adress

Issue #11333 https://github.com/ariya/phantomjs/issues/11333
Netsniff.js example should exit with an error when fails to load the adress

Issue #11333 https://github.com/ariya/phantomjs/issues/11333
third-party.txt: Include OpenSSL.

Issue #11269 https://github.com/ariya/phantomjs/issues/11269
Make QNetworkReplyHandler deliver content asynchronously
when its load type is set to SynchronousLoad.

Issue #11338: https://github.com/ariya/phantomjs/issues/11338
Upstream bug: https://bugs.webkit.org/show_bug.cgi?id=62808
Update ChangeLog with the important (backported) network crash fix.
Issue #10939: Mark for the upcoming version 1.9.1.

https://github.com/ariya/phantomjs/issues/10939