"hg clone git+http://foo" cannot send HTTP auth credentials

Created originally on Bitbucket by muxator

I'm trying to clone against a git repository which is exposed in HTTP and requires a basic authentication.

Not willing to modify the clone URL (more on this later), I configured my credentials in /etc/mercurial/hgrc

#!ini
[auth]
foo.prefix = git+http://hostname
foo.username = myuser
foo.password = mypwd

but when doing:

#!bash
hg clone git+http://hostname

HTTP credetials do not get read from hgrc (and do not get sent: verified with strace -e network).

On the other hand:

#!bash
hg clone git+http://myuser@hostname

gives "abort: error: Name or service not known" (the url parsing phase fails), while:

#!bash

hg clone git+http://myuser:mypwd@hostname

fails even worse, throwing "httplib.InvalidURL: nonnumeric port: 'mypwd@hostname'"

Do exist a way to pass HTTP credentials when cloning from a git repo?