speed.cgi: reduce system load by copying two general-functions.

speed.cgi: reduce system load by copying two general-functions.

include general-functions.pl load and initialize many subfunctions that are not
needed by speed.cgi which was executed very often.
So this reduce the system load significant if webif was open in browser
and ajax-speed display enabled.

Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>
Reviewed-by: Bernhard Bitsch <bbitsch@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>