list.h is an accel-ppp internal file.
Signed-off-by: NGuillaume Nault <g.nault@alphalink.fr>

Pass a full string, instead of an array of words, to the "help" callback
of regexp command handlers. Also register these command handlers using
a regexp to apply on "help" commands, just like for exec commands. The
"help" callback will then be called only if the command matches the
"help" regexp.

As a side effect, the "help" word and its following spaces are skipped
before calling the "help" callback for both simple and regexp commands.
Signed-off-by: NGuillaume Nault <g.nault@alphalink.fr>

Append the format() __attribute__ to function prototypes which
use a format string. This allows GCC to check for consistency
between the format string and its arguments when these
functions are called.
Signed-off-by: NGuillaume Nault <g.nault@alphalink.fr>

shaper_tbf: add column "rate-limit" for "show sessions"