BUG/MINOR: mux_h2: fix incorrect stat titles

Duplicate titles for the stats H2_ST_{OPEN,TOTAL}_{CONN,STREAM}. These
entries are used on csv for the heading.

This must be backported up to 2.3.

This fixes the github issue #1102.

(cherry picked from commit 377d8786a79dad763ccdd40afbd52dccff9c9980)
Signed-off-by: Willy Tarreau <w@1wt.eu>
1 file changed