FYI/BRANCH: Patches applied to branch gdb-9-branch

[Joel Brobecker]

Hello,

FYI, I am about to push the following two commits to the newly
created gdb-9-branch, which perform the initial preparations
for the upcoming releases off of that new branch.

  - [release/branch 1/2] Bump version to 9.0.90.DATE-git.
  - [release/branch 2/2] Set development mode to "off" by default.

Thanks,
-- 
Joel