Fix mongoose docs generation

PUBLISHED_FROM=331821dcd1f7dc8a94581cd8a9b51aa00a89fddc

docs/c-api/mg_mqtt_server.h/LIST_ENTRY.md

@@ -0,0 +1,10 @@
+---
+title: "LIST_ENTRY()"
+decl_name: "LIST_ENTRY"
+symbol_kind: "func"
+signature: |
+    LIST_ENTRY(mg_mqtt_session);
+---
+
+Broker 
+

docs/c-api/mg_mqtt_server.h/intro.md

@@ -0,0 +1,12 @@
+---
+title: "MQTT Server API reference"
+symbol_kind: "intro"
+decl_name: "mg_mqtt_server.h"
+items:
+  - { name: LIST_ENTRY.md }
+  - { name: struct_mg_mqtt_broker.md }
+  - { name: struct_mg_mqtt_session.md }
+---
+
+
+

docs/c-api/mg_mqtt_server.h/struct_mg_mqtt_broker.md

@@ -0,0 +1,13 @@
+---
+title: "struct mg_mqtt_broker"
+decl_name: "struct mg_mqtt_broker"
+symbol_kind: "struct"
+signature: |
+  struct mg_mqtt_broker {
+    LIST_HEAD(_mg_sesshead, mg_mqtt_session) sessions; /* Session list */
+    void *user_data;                                   /* User data */
+  };
+---
+
+MQTT broker. 
+

docs/c-api/mg_mqtt_server.h/struct_mg_mqtt_session.md

@@ -0,0 +1,17 @@
+---
+title: "struct mg_mqtt_session"
+decl_name: "struct mg_mqtt_session"
+symbol_kind: "struct"
+signature: |
+  struct mg_mqtt_session {
+    struct mg_mqtt_broker *brk;       /* Broker */
+    LIST_ENTRY(mg_mqtt_session) link; /* mg_mqtt_broker::sessions linkage */
+    struct mg_connection *nc;         /* Connection with the client */
+    size_t num_subscriptions;         /* Size of `subscriptions` array */
+    void *user_data;                  /* User data */
+    struct mg_mqtt_topic_expression *subscriptions;
+  };
+---
+
+MQTT session (Broker side). 
+