Merge commit 'origin/revert_mhl_to_glib_mc-4.6' into mc-4.6

Merge commit 'origin/revert_mhl_to_glib_mc-4.6' into mc-4.6

* commit 'origin/revert_mhl_to_glib_mc-4.6':
  fixed mismerge: completion stuff
  mismerge fix: g_concat -> g_strconcat
  header guard fix
  Remove some of the SHELL_ESCAPE_STR Stuff...
  Revert "introduced new type SHELL_ESCAPED_STR for more type safety"
  Last bunch of reverts and removal of mhl/*
  fixed canonicalize_pathname() breakage: fixed str_move() function (memmove semantics) again
  Revert some functions (mhl_mem_free to g_free, etc)
  Revert "replaced buggy concat_dir_and_file() by mhl_str_dir_plus_file()"
  Revert "mhl: mhl_shell_unescape_buf(): fixed memory array OOB."
  Revert "build fix: added missing declaration of mhl_dir_plus_file (reported by andrew_b)"
  Revert "cleanup: mhl_str_dir_plus_file(): int -> size_t (suggested by Andrew Borodin)"
  Revert "fixed #240"
  Revert "Fixing a theoretical buffer overflow which was reported by Roland Illig"
  Revert "Call va_end after the iteration as we need to free the list again."
  Revert "Added enhancements from Sergei which he attached to #241."
  Revert "Resolve some issues in mhl Rollang Illig pointed us to:"

Conflicts:
	ChangeLog