Before this series, many help() functions opened the pager. This got lost
in the translation. Starting the pager requires access to arg_pager_flags.
While we could pipe this through in case when command_print_help() is
called directly, but this hard in the case when verb_help_auto() or
VERB_COMMON_HELP_AUTO/VERB_COMMON_HELP_AUTO_HIDDEN are used. Let's instead
extend the (const static) CommandDescription structure with a pointer to
the arg_pager_flags variable. This restores the pager functionality in a
uniform fashion with a one-line change in the individual binaries.
Zbigniew Jędrzejewski-Szmek
7670c20c6e