PHP 7.3 won't be supported by upstream for the entire life cycle of
the 21.11 release.
Also drop the pcre' alias since it isn't needed anymore since we don't
need different pcre versions anymore.
If invoked with php 7.4 on a up2date Drupal 7 installation, drush
complains with a deprecation warning, that swallows all legit output:
> drush uli
Deprecated function: Array and string offset access syntax with curly braces is [error]
deprecated in include_once() (line 20 of
/var/www/…/htdocs/includes/file.phar.inc).
Use php7.3 when invoking drush.
All the programs provided by ncurses were being installed to the $dev
output, but several of them are intended for runtime use, e.g. to
operate on the running terminal. These user-facing programs are moved to
the $bin output.
Several packages referred to "${ncurses}/bin" or "${ncurses.dev}/bin" at
runtime; these paths are also updated to refer to "${ncurses.bin}/bin".
