Try to set mtime directly only for http urls.
Try to set mtime directly only for http urls.

Mtime detection may be broken for other types of urls, therefore
just ensure that we handle an HTTP url.

skoef/pkg,khorben/pkg,skoef/pkg,junovitch/pkg,junovitch/pkg,khorben/pkg,khorben/pkg,Open343/pkg,en90/pkg,Open343/pkg,en90/pkg