Revert "Use the FILE_SHARE_DELETE flag for CreateFile on a mapping"

This reverts commit 884a0e269c382f9e927d8c8b1ef4ef9d2d48379d.

I'm reverting this because it doesn't actually make the problem go
away.  It appears that instead we need to do unmap-then-replace.
Merge remote-tracking branch 'origin/maint-0.2.4'
Fix #9043 - simplyfy the code and use EVP_PKEY_cmp instead of pkey_eq / tor_tls_evp_pkey_eq
Issue #9043 - changelog entry