MINOR: spoe: Add max-waiting-frames directive in spoe-agent configuration

This is the maximum number of frames waiting for an acknowledgement on the same
connection. This value is only used when the pipelinied or asynchronus exchanges
between HAProxy and SPOA are enabled. By default, it is set to 20.

doc/SPOE.txt

@@ -167,6 +167,7 @@ spoe-agent <name>
     - maxconnrate
     - maxerrrate
     - max-frame-size
+    - max-waiting-frames
     - messages
     - [no] option async
     - [no] option pipelining
@@ -209,6 +210,10 @@ max-frame-size <number>
   It must be in the range [256, tune.bufsize-4] (4 bytes are reserved for the
   frame length). By default, it is set to (tune.bufsize-4).
 
+max-waiting-frames <number>
+  Set the maximum number of frames waiting for an acknowledgement on the same
+  connection. This value is only used when the pipelinied or asynchronus
+  exchanges between HAProxy and SPOA are enabled. By default, it is set to 20.
 
 messages <msg-name> ...
   Declare the list of SPOE messages that an agent will handle.

src/flt_spoe.c

@@ -3455,6 +3455,23 @@ cfg_parse_spoe_agent(const char *file, int linenum, char **args, int kwm)
 			goto out;
 		}
 	}
+	else if (!strcmp(args[0], "max-waiting-frames")) {
+		if (!*args[1]) {
+			ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n",
+				 file, linenum, args[0]);
+                        err_code |= ERR_ALERT | ERR_FATAL;
+                        goto out;
+                }
+		if (alertif_too_many_args(1, file, linenum, args, &err_code))
+			goto out;
+		curagent->max_fpa = atol(args[1]);
+		if (curagent->max_fpa < 1) {
+			ha_alert("parsing [%s:%d] : '%s' expects a positive integer argument.\n",
+				 file, linenum, args[0]);
+			err_code |= ERR_ALERT | ERR_FATAL;
+			goto out;
+		}
+	}
 	else if (!strcmp(args[0], "register-var-names")) {
 		int   cur_arg;