Changed the deadlock detector interval to 120 seconds.Closes #2550

[Seadragon91]

Changed the default deadlock detector interval to 120 seconds.

[Seadragon91]

If 120 seconds are okay, please merge.

[madmaxoft]

I'm not too happy about this change, 120 seconds per tick is really bad, but what can I do.

[SafwatHalaby]

What kind of computations take that long in the first place?

[Seadragon91]

Currently is the problem, that the nether world will be generated if you go into the portal. On a raspberry pi, it takes longer than the 20 seconds, then the deadlock detector assumes freeze and aborts the server.

[madmaxoft]

So we're fixing the result, instead of the cause...

[Seadragon91]

Another problem is if you fly trough the world, where it also can deadlock, issue #2263. Chunk generator to overloaded.

[Seadragon91]

I know this is only a workaround...

[SafwatHalaby]

Some proposals:

• Solve traveling through portals issue via "Phantom worlds" #2810.
• When the chunk generator is overloaded (due to flight / fast movement), prevent players from venturing further into ungenerated areas by creating a temporary invisible wall.

This should eliminate the need for this PR and fix the actual issues rather than the symptoms.