REGTESTS: add minimal CLI "add map" tests

The map_redirect test already tests for "show map", "del map" and
"clear map" but doesn't have any "add map" command. Let's add some
trivial ones involving one regular entry and two other ones added as
payload, checking they are properly returned.

(cherry picked from commit deee369cfabdea713e232c94c5d15f9613109fe9)
Signed-off-by: Willy Tarreau <w@1wt.eu>
1 file changed