* guix/gnupg.scm (%gpg-command): Turn into a SRFI-39 parameter. (%openpgp-key-server): Likewise. Default to pgp.mit.edu, as keys.gnupg.net is unreliable. Update users.
* guix/gnu-maintenance.scm (ftp-server/directory)[quirks]: Add glib. (package-update-path, download-tarball, package-update, update-package-source): New procedures. * guix/gnupg.scm, guix/scripts/refresh.scm: New files. * Makefile.am (MODULES): Add them. * guix/utils.scm (file-extension): New procedure.