gnus-registry.el, registry.el: Silence the byte compiler.

gnus-registry.el, registry.el: Silence the byte compiler.

gnus-registry.el: Eliminate cl functions.
 (gnus-registry-sort-addresses): New function that replaces mapcan.
 (gnus-registry-action, gnus-registry-spool-action)
 (gnus-registry-split-fancy-with-parent)
 (gnus-registry-fetch-recipients-fast): Use it.
 (gnus-registry-import-eld): Replace delete* with dolist + delq.
registry.el (initialize-instance, registry-lookup)
 (registry-lookup-breaks-before-lexbind, registry-lookup-secondary)
 (registry-lookup-secondary-value, registry-search, registry-delete)
 (registry-insert, registry-reindex, registry-size, registry-prune):
 Use eval-and-compile.