Delete src/or/buffers.c which was fixup'ed in 0.2.9 but moved in 0.3.5.
The 0.2.9 fix is not required for the 0.3.5 patch.
Resolves merge conflict caused by 30041.

Fixes bug 31374; bugfix on 0.2.9.1-alpha.

My previous fix removed a comparison, which would have caused us to
warn about every skew instead of skews of over an hour.

Merge changed chutney and stem script lines from 29280 with changed
stem script lines from 30591.

Merge rust additions in 0.3.5 with sudo deletions in 0.2.9.