survey: Add Feb, 2021 survey article

[kallisti5]

[kallisti5]

Quick + fast improvements complete. The rest need some discussion :-)

[kallisti5]

I didn't read the blog really, just copy&pasted into a Mail window for spellchecking. Something I'd suggest to always do before doing the PR...

I need a spell checker in vi :laughing:

[leavengood]

This has been stagnating a while. Maybe just change the speculation about network stuff (people could provide more details in the comments) and fix the issues I mentioned and then let's merge.

[bitigchi]

It looks like this could have been a good chance to communicate with the outer developer community about what is missing from Haiku, and call for help.

[jt15s]

Any progress on this?