Corrected numerous minor regressions.

The most significant of these include: a regression in
define_aliases_suffix_media() resulting in annoying startup warnings; a
related regression in both get_list_size() and set_list_to_string_lines()
resulting in empty lines being ignored; and a regression in backup_drush_site()
resulting in such function always failing.

 "Tiredly, to my indebted rest.
 Doggedly, to my extravated vassal of a
      curbside's mockery.

  Alleviate this herbal-flocked extravagance,
  Salacious in its sally ported vagrancy, an
  Intestinally oft-detested verbal entourage
  Enraging,
  Exhorting,
  Exhaling ballyhoo on
  Much ado about the
  Mulch of souls in lollygag
  Entwined."