MINOR: cli: make it possible to enter multiple values at once with "set table"

MINOR: cli: make it possible to enter multiple values at once with "set table"

The "set table" statement allows to create new entries with their respective
values. Till now it was limited to a single data type per line, requiring as
many "set table" statements as the desired data types to be set. Since this
is only a parser limitation, this patch gets rid of it. It also allows the
creation of a key with no data types (all reset to their default values).