Merge branch 'jk/forbid-lf-in-git-url' into maint

Newline characters in the host and path part of git:// URL are
now forbidden.

* jk/forbid-lf-in-git-url:
  fsck: reject .gitmodules git:// urls with newlines
  git_connect_git(): forbid newlines in host and path

diff --cc connect.c
Simple merge

diff --cc fsck.c
Simple merge

diff --cc t/t5570-git-daemon.sh
Simple merge