Remove mg_enable_multithreading. Close cesanta/dev#6511

PUBLISHED_FROM=7864ffa26cb553f5d4a93248f67c288327ec23b0

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

@@ -12,7 +12,6 @@ items:
   - { name: mg_connect.md }
   - { name: mg_connect_opt.md }
   - { name: mg_enable_javascript.md }
-  - { name: mg_enable_multithreading.md }
   - { name: mg_mgr_free.md }
   - { name: mg_mgr_init.md }
   - { name: mg_mgr_init_opt.md }
@@ -33,7 +32,6 @@ items:
   - { name: struct_mg_connection.md }
   - { name: struct_mg_mgr.md }
   - { name: struct_mg_mgr_init_opts.md }
-  - { name: struct_mg_multithreading_opts.md }
 ---
 
 NOTE: Mongoose manager is single threaded. It does not protect

docs/c-api/net.h/mg_enable_multithreading.md

@@ -1,14 +0,0 @@
----
-title: "mg_enable_multithreading()"
-decl_name: "mg_enable_multithreading"
-symbol_kind: "func"
-signature: |
-  void mg_enable_multithreading(struct mg_connection *nc);
----
-
-Enables multi-threaded handling for the given listening connection `nc`.
-For each accepted connection, Mongoose will create a separate thread
-and run an event handler in that thread. Thus, if an event handler is doing
-a blocking call or some long computation, it will not slow down
-other connections. 
-

docs/c-api/net.h/struct_mg_connection.md

@@ -31,8 +31,8 @@ signature: |
        * void pointers, since some archs might have fat pointers for functions.
        */
       mg_event_handler_t f;
-    } priv_1;       /* Used by mg_enable_multithreading() */
-    void *priv_2;   /* Used by mg_enable_multithreading() */
+    } priv_1;
+    void *priv_2;
     void *mgr_data; /* Implementation-specific event manager's data. */
     struct mg_iface *iface;
     unsigned long flags;

docs/c-api/net.h/struct_mg_multithreading_opts.md

@@ -1,12 +0,0 @@
----
-title: "struct mg_multithreading_opts"
-decl_name: "struct mg_multithreading_opts"
-symbol_kind: "struct"
-signature: |
-  struct mg_multithreading_opts {
-    int poll_timeout; /* Polling interval */
-  };
----
-
-Optional parameters for mg_enable_multithreading_opt() 
-