editorconfig: add --HEAD

Closes #19961.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Libvirt 1.0.5.1

Closes #19958.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Cassandra 1.2.5

Closes #19956.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>