BUG/MINOR: stick-table: fix several printf sign errors dumping tables

BUG/MINOR: stick-table: fix several printf sign errors dumping tables

This patch fixes several errors printing integers
of stick table entry values and args during dump on cli.

This patch should be backported since the dump of entries
is supported.  [wt: roughly 1.5-dev1 hence all stable branches]

(cherry picked from commit 01928ae56b0296e5312eca195a4e155d6e8d79d0)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit c24b414034d4b7f848ba37ac0a6fe28271375b4b)
Signed-off-by: Willy Tarreau <w@1wt.eu>