[req] drop from_controller on non WebRequest object (Closes #2901079)
The `controller` concept is purely a web things. It does not belong to generic
`req` object.
The `build_url` code is slightly changed to handle that. This probably requires
extended cleanup later.
This is a barely used and very internal API. No deprecation period
from logilab.common.shellutils import generate_password
from cubicweb.server.utils import crypt_password
for user in rql('CWUser U WHERE U cw_source S, S name "system", U upassword P, U login L').entities():
salt = user.upassword.getvalue()
if crypt_password('', salt) == salt:
passwd = generate_password()
print 'setting random password for user %s' % user.login
user.set_attributes(upassword=passwd)
commit()