MINOR: proxy: add proxy->options3

proxy->options2 is almost full, yet we will add new log-forward options
in upcoming patches so we anticipate that by adding a new {no_}options3
and cfg_opts3[] to further extend proxy options

include/haproxy/proxy-t.h

@@ -170,6 +170,10 @@ enum PR_SRV_STATE_FILE {
 #define PR_O2_CHK_ANY   0xF0000000      /* Mask to cover any check */
 /* end of proxy->options2 */
 
+/* bits for proxy->options3 */
+/* unused: 0x00000000 to  0x80000000 */
+/* end of proxy->options3 */
+
 /* Cookie settings for pr->ck_opts */
 #define PR_CK_RW        0x00000001      /* rewrite all direct cookies with the right serverid */
 #define PR_CK_IND       0x00000002      /* keep only indirect cookies */
@@ -294,6 +298,7 @@ struct proxy {
 
 	int options;				/* PR_O_REDISP, PR_O_TRANSP, ... */
 	int options2;				/* PR_O2_* */
+	int options3;                           /* PR_O3_* */
 	unsigned int ck_opts;			/* PR_CK_* (cookie options) */
 	unsigned int fe_req_ana, be_req_ana;	/* bitmap of common request protocol analysers for the frontend and backend */
 	unsigned int fe_rsp_ana, be_rsp_ana;	/* bitmap of common response protocol analysers for the frontend and backend */
@@ -429,6 +434,7 @@ struct proxy {
 	/* used only during configuration parsing */
 	int no_options;				/* PR_O_REDISP, PR_O_TRANSP, ... */
 	int no_options2;			/* PR_O2_* */
+	int no_options3;                        /* PR_O3_* */
 
 	struct {
 		const char *file;		/* file where the section appears */

include/haproxy/proxy.h

@@ -39,6 +39,7 @@ extern struct eb_root proxy_by_name;    /* tree of proxies sorted by name */
 
 extern const struct cfg_opt cfg_opts[];
 extern const struct cfg_opt cfg_opts2[];
+extern const struct cfg_opt cfg_opts3[];
 
 struct task *manage_proxy(struct task *t, void *context, unsigned int state);
 void proxy_cond_pause(struct proxy *p);

src/cfgparse-listen.c

@@ -2066,6 +2066,14 @@ stats_error_parsing:
 		if (err_code & ERR_CODE)
 			goto out;
 
+		/* try to match option within cfg_opts3 */
+		if (cfg_parse_listen_match_option(file, linenum, kwm, cfg_opts3, &err_code, args,
+		                                  PR_MODES, PR_CAP_NONE,
+		                                  &curproxy->options3, &curproxy->no_options3))
+			goto out;
+		if (err_code & ERR_CODE)
+			goto out;
+
 		/* HTTP options override each other. They can be cancelled using
 		 * "no option xxx" which only switches to default mode if the mode
 		 * was this one (useful for cancelling options set in defaults

src/proxy.c

@@ -136,6 +136,12 @@ const struct cfg_opt cfg_opts2[] =
 	{ NULL, 0, 0, 0 }
 };
 
+/* proxy->options3 */
+const struct cfg_opt cfg_opts3[] =
+{
+	{ NULL, 0, 0, 0 }
+};
+
 /* Helper function to resolve a single sticking rule after config parsing.
  * Returns 1 for success and 0 for failure
  */