MINOR: htx: Add a function to know if the free space wraps

the htx_space_wraps() function may now be used to know if the free space of
an HTX message wraps. It does the same as b_space_wraps().

(cherry picked from commit 361fbcc14acc4a3bed9161934f2524db8ac2069e)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
1 file changed