Issue:
stash git daemon over git+ssh protocol does not close connection on wrong protocol (by client).

Reproducing:
curl -v http://your_stash_host:7999/your/stash/repo

Long description:
'go get <repo_url>' tries to pull the source code from remote SCM (git, svn, hg, etc) - see http://golang.org/cmd/go/#hdr-Remote_import_paths and 'go get' command description on the same page.

'go get' fails with git+ssh link. The reason is that 'go get' command tries to guess the protocol for the repository access, and goes in the following order: git, https, http, git+ssh.

When it tries to guess the protocol, it simply runs 'git ls-remote <scheme>://repo-url'. So in case of Stash repo with git+ssh access, 'go get' will try:
#1 git ls-remote git://repo-url
#2 git ls-remote https://repo-url
#3 git ls-remote http://repo-url
#4 git ls-remote git+ssh://repo-url

#1 and #2 fail, and #3 gets stuck, so #4 never executes.
If I try #3 with curl, it never finishes indeed:

SFOLSASHAKMAC01: alexkr$ curl -v http://stash1.ops.****.com:7999/skras/httpstore.git

• Adding handle: conn: 0x7f8269801a00
• Adding handle: send: 0
• Adding handle: recv: 0
• Curl_addHandleToPipeline: length: 1
• - Conn 0 (0x7f8269801a00) send_pipe: 1, recv_pipe: 0
• About to connect() to stash1.ops.*****.com port 7999 (#0)
• Trying 10.22.15.54...
• Connected to stash1.ops.*****.com (10.22.15.54) port 7999 (#0)
  > GET /skras/httpstore.git HTTP/1.1
  > User-Agent: curl/7.30.0
  > Host: stash1.ops.****.com:7999
  > Accept: /
  >
  SSH-2.0-SSHD-CORE-0.9.0-ATLASSIAN-5
  ^C
  SFOLSASHAKMAC01:alexkr$

If I try the same to the local SSH port (listening by sshd), curl reports protocol mismatch and connection is immediately terminated by peer (sshd):

root@g2mgdev1app1:~# curl -v http://localhost:22/

• Hostname was NOT found in DNS cache
• Trying 127.0.0.1...
• Connected to localhost (127.0.0.1) port 22 (#0)
  > GET / HTTP/1.1
  > User-Agent: curl/7.35.0
  > Host: localhost:22
  > Accept: /
  >
  SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2
  Protocol mismatch.
• Recv failure: Connection reset by peer
• Closing connection 0
  curl: (56) Recv failure: Connection reset by peer
  root@g2mgdev1app1:~#