Cherry-pick ecea7218fb9b994b26471e9877851cdb51a5f1d4 and cdef5a7161767c2c4b3b7cb2542cf1d29b6d4a09

[kadircet]

Bugzilla Link	49243
Resolution	FIXED
Resolved on	Feb 22, 2021 12:26
Version	unspecified
OS	All
Blocks	#48246
CC	@sam-mccall,@tstellar
Fixed by commit(s)	ecea721 cdef5a7 d840463 b601100

Extended Description

These two make our config system more useful to windows users. We were handling paths case-sensitively which isn't true for windows and apple.

ecea721
cdef5a7

[kadircet]

assigned to @sam-mccall

[tstellar]

Sam, what do you think about backporting these?

Kadir, these don't apply to the release/12.x branch, can you resolve the conflicts and push a branch up to a GitHub repo?

[sam-mccall]

They don't apply cleanly because we're missing an important dependency b63cd4d

I'd considered asking for that one to be cherrypicked in its own right but didn't think it was critical enough. I believe they're safe enough though, and significant problems for windows users, so we picking all three seems reasonable to me.

Together the three apply cleanly, but I've prepared a branch anyway:

release/12.x...sam-mccall:clangd-path-case-12-cherrypicks

[tstellar]

Merged: b601100