GL mode selection warning is unclear

[necessarily-equal]

The game may not be aware ok GL4? Or it finds the wrong version? Anyway here's the log:

Using preferred context - 24-bit OpenGL 3.2 core 
OpenGL Renderer: Mesa DRI Intel(R) HD Graphics 4000 (IVB GT2) 
Warn: Provided OpenGL 4.2 is not the same as requested 3.2 version 
Using GL3 Renderer in OpenGL 3.x mode... 

[illwieckz]

It just means we request OpenGL 3.2 but for some reasons the driver provides more. It seems to happen with Mesa driver (I get the same with radeon). This is not an issue in Dæmon. And since more can do less (in this case it's 100% true) it's not a problem.

The issue is that a contributor may introduce code using OpenGL 4.6 features and have it working on his end because his driver enables the feature without the game requesting it to be enabled, meaning the game would be broken on other drivers for other users while the developer would say “it works for me”.

We may rewrite the message to make it more obvious it's a driver issue, may be like this:

- Warn: Provided OpenGL 4.2 is not the same as requested 3.2 version
+ Warn: The engine requested OpenGL 3.2 but the driver provided 4.2 version instead

[necessarily-equal]

Oh ok, I expected worse. I'll do a PR for this one day if you didn't start one

[illwieckz]

It would be problematic if the version is lower than what requested, if I remind correctly I only implemented a check for a difference between them. Maybe we can do a different message when it's lower or greater than what requested.

[VReaperV]

As was discovered in #1105, getting a higher GL context version can also bring issues (different core vs extension function or built-in constant naming).

[VReaperV]

Given the above, this seems to be fine to leave as is, as context versions both above/below requested version can cause issues.