use consistent http header case

Author: ekoby

library/legacy_auth.c

@@ -345,7 +345,7 @@ void legacy_timer_cb(uv_timer_t *t) {
         tlsuv_http_req_query(req, 1, &(tlsuv_http_pair){"method", "cert"});
     } else {
         cstr bearer = cstr_from_fmt("Bearer %s", cstr_str(&auth->primary_jwt));
-        tlsuv_http_req_header(req, "authorization", cstr_str(&bearer));
+        tlsuv_http_req_header(req, "Authorization", cstr_str(&bearer));
         tlsuv_http_req_query(req, 1, &(tlsuv_http_pair){"method", "ext-jwt"});
     }
 

library/ziti_ctrl.c

@@ -385,7 +385,7 @@ void ziti_ctrl_clear_auth(ziti_controller *ctrl) {
     if (ctrl->client) {
         CTRL_LOG(DEBUG, "clearing api session token for ziti_controller");
         tlsuv_http_header(ctrl->client, "zt-session", NULL);
-        tlsuv_http_header(ctrl->client, "authorization", NULL);
+        tlsuv_http_header(ctrl->client, "Authorization", NULL);
     }
 }