Fix title handling

1. file:/// stay the same when you navigate
    2. Fix "http://~" to "file://~" in home dir
    3. Expands "file://~" to "file://home/user"

Thanks to quinq for fixing the issue #1 in commit 934705c in surf2.

Signed-off-by: Christoph Lohmann <20h@r-36.net>

surf.c

@@ -802,6 +802,7 @@ loadstatuschange(WebKitWebView *view, GParamSpec *pspec, Client *c)
 			               & SOUP_MESSAGE_CERTIFICATE_TRUSTED);
 		}
 		setatom(c, AtomUri, uri);
+		c->title = copystr(&c->title, uri);
 
 		if (enablestyle)
 			setstyle(c, getstyle(uri));