flatpak: update build-manifest to retrieve dependencies without initial download phase: - dependencies are now entirely retrieved from the installation, and requirement are build from there. The source package is currently always used, and it is now possible to use PYTHON_DEP_PREINSTALL to add extra packages or use a specific version of a package. - fixed insertion of `release_elt` for dev version at the right location. - `branch` is not set anymore for stable versions. - libxslt is not added anymore as it is part of freedesktop runtime - flathub share-modules is now used for Python 2

#!/usr/bin/env python2
# This script simulate prosodyctl adduser/passwd/deluser and call it on the prosody container
import sys, xmlrpclib

proxy = xmlrpclib.ServerProxy("http://prosody:9999/")
def pwd():
    pwd1=raw_input(); pwd2=raw_input(); assert pwd1==pwd2
    return pwd1

password = pwd() if sys.argv[1] in ["adduser", "passwd"] else ""
sys.exit(proxy.prosodyctl(sys.argv[1], sys.argv[2], password))