Merge branch 'kl/t7528-ssh-agent-for-csh-users'

The 'ssh-agent' tests in 't7528' have been fixed to work when the
user's login shell is csh-like, by explicitly passing '-s' to
'ssh-agent' to force Bourne shell syntax.

* kl/t7528-ssh-agent-for-csh-users:
  t7528: fix failure under csh

diff --cc t/t7528-signed-commit-ssh.sh
Simple merge