ssh: unban the use of pipe character in user@host:port string This vulnerability was fixed by the previous patch and there were more ways to exploit than using '|shellcmd'. So it doesn't make sense to reject only pipe character. Test cases are updated to actually try to exploit the bug. As the SSH bridge of git/svn subrepos are not managed by our code, the tests for non-hg subrepos are just removed. This may be folded into the original patches.

Ancestors of 5
4 2 0 
Ancestors of 6 and 5
3 4 2 1 0 
Ancestors of 5 and 4
4 2 0 
Ancestors of 7, stop at 6
6 
Ancestors of 7, including revs
7 6 5 3 4 2 1 0 
Ancestors of 7, 5 and 3, including revs
7 5 3 6 4 2 1 0 

Descendants of 5
7 8 
Descendants of 5 and 3
6 7 8 
Descendants of 5 and 4
5 7 8