git-mv with absolute path derefereces symlinks

[Martin Erik Werner <martinerikwerner@gmail.com>]

Hi,

If git-mv is provided absolute paths when moving symlinks, it tries to
dereference them and (attempts to) move the symlink target rather than the
symlink itself, this seems like a quite odd behaviour since it's inconsistent
with how git-mv works with symlinks if given relative paths, and I'm thinking
it might be a bug, since it not documented in the git-mv manpage.

###
$ git init linktest
Initialized empty Git repository in /home/arand/tmp/linktest/.git/
$ cd linktest/
$ touch target
$ ln -s target link
$ ln -s /tmp/target link2
$ git add .
$ git commit -m1
[master (root-commit) 3cfea66] 1
 3 files changed, 2 insertions(+)
 create mode 120000 link
 create mode 120000 link2
 create mode 100644 target
$ git mv "$(pwd)/link" "$(pwd)/moved"
$ git status
On branch master
Changes to be committed:
  (use "git reset HEAD <file>..." to unstage)

        renamed:    target -> moved

$ git mv "$(pwd)/link2" "$(pwd)/moved2"
fatal: /home/arand/tmp/linktest/link2: '/home/arand/tmp/linktest/link2' is outside repository
###

--
Martin Erik Werner <martinerikwerner@gmail.com>