message: Travis network errors: use github mirrors for git.apache.org
diff: @@ -15,8 +15,10 @@ before_install:
  - sudo add-apt-repository -y ppa:git-core/ppa
  - sudo apt-get update -q
  - sudo apt-get install -q -y git
  + # git.apache.org is the canonical repo but throttles network connections.
  + # using github.com seems to reduce network errors a lot.
  + - git config --global url.https://github.com/apache/.insteadOf git://git.apache.org/
  - git submodule update --init --recursive --jobs=6
  -
  env:
  global:
  - MAKEFLAGS=-j3
  