Refactor Mongoose documentation

PUBLISHED_FROM=e9a4e5c7b4a1d03b93a2a79e29de19e60e919929

docs/c-api/http_server.h/mg_send_http_chunk.md

@@ -0,0 +1,25 @@
+---
+title: "mg_send_http_chunk()"
+decl_name: "mg_send_http_chunk"
+symbol_kind: "func"
+signature: |
+  void mg_send_http_chunk(struct mg_connection *nc, const char *buf, size_t len);
+---
+
+Sends buffer `buf` of size `len` to the client using chunked HTTP encoding.
+This function sends the buffer size as hex number + newline first, then
+the buffer itself, then the newline. For example,
+`mg_send_http_chunk(nc, "foo", 3)` whill append the `3\r\nfoo\r\n` string
+to the `nc->send_mbuf` output IO buffer.
+
+NOTE: The HTTP header "Transfer-Encoding: chunked" should be sent prior to
+using this function.
+
+NOTE: do not forget to send an empty chunk at the end of the response,
+to tell the client that everything was sent. Example:
+
+```
+  mg_printf_http_chunk(nc, "%s", "my response!");
+  mg_send_http_chunk(nc, "", 0); // Tell the client we're finished
+``` 
+