BUG/MINOR: ssl: Wrong OCSP CID after modifying an SSL certficate

BUG/MINOR: ssl: Wrong OCSP CID after modifying an SSL certficate

This bug could be reproduced with the "set ssl cert" CLI command to update
a certificate. The OCSP CID is duplicated by ckchs_dup() which calls
ssl_sock_copy_cert_key_and_chain(). It should be computed again by
ssl_sock_load_ocsp(). This may be accomplished resetting the new ckch OCSP CID
returned by ckchs_dup().

This bug may be in relation with GH #2319.

Must be backported to 2.8.

(cherry picked from commit 75f5977ff4ccf205ee386e4f4b0c384fb6a110d5)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>