Revert "Don't match editor backup files in env...

This reverts commit 32eda4b92faa7b0f3420524b2641ef1a199756e9.

I noticed today that environment.d files no longer seem to get sourced
by DIB. Reverting this commit fixes it.

Change-Id: I08a8feab541901c8fd0a803628f5aeb6c0eec598
Closes-bug: #1339116