Fixed parsing of URI with a IPv6-address

Allowed ipv6-address in a uri like:
  http://[::1]:8080/repo.git

Change-Id: Ia00a20f694b2e9314892df77f9b11f551bb1d34e
Signed-off-by: Chris Aniszczyk <zx@twitter.com>

org.eclipse.jgit.test/tst/org/eclipse/jgit/transport/URIishTest.java

@@ -822,7 +822,7 @@ public class URIishTest {
 		String[] users = new String[] { "me", "l usr\\example.com",
 				"lusr\\example" };
 		String[] passes = new String[] { "wtf", };
-		String[] hosts = new String[] { "example.com", "1.2.3.4" };
+		String[] hosts = new String[] { "example.com", "1.2.3.4", "[::1]" };
 		String[] ports = new String[] { "1234", "80" };
 		String[] paths = new String[] { "/", "/abc", "D:/x", "D:\\x" };
 		for (String[] test : tests) {

org.eclipse.jgit/src/org/eclipse/jgit/transport/URIish.java

@@ -87,7 +87,7 @@ public class URIish implements Serializable {
 	 * Part of a pattern which matches the host part of URIs. Defines one
 	 * capturing group containing the host name.
 	 */
-	private static final String HOST_P = "([^\\\\/:]+)"; //$NON-NLS-1$
+	private static final String HOST_P = "((?:[^\\\\/:]+)|(?:\\[[0-9a-f:]+\\]))";
 
 	/**
 	 * Part of a pattern which matches the optional port part of URIs. Defines