LinkUtil.GetMediaUrl adds unnecessary slash when domain is set

[zzzzBov]

If the sitecore link manager has alwaysIncludeServerUrl set to true, MediaManager.GetMediaUrl(mediaItem) will return a link along the lines of:

http://sub.domain.tld/~/media/Images/path/...

LinkUtil.GetMediaUrl line 16 shows:

return Sitecore.StringUtil.EnsurePrefix('/', Sitecore.Resources.Media.MediaManager.GetMediaUrl(mediaItem));

which will convert the produced URL into:

/http://sub.domain.tld/~media/Images/path/...