Temporarily disable appdash from docker-compose

Until I read the doc and find how to limit the retention,
otherwise it just eats all my ram and cpu and things start to fall
apart.

PUBLISHED_FROM=eb33fb44736f07b992270689217aca4af70513ff

docs/c-api/http.h/mg_send_head.md

@@ -1,21 +0,0 @@
----
-title: "mg_send_head()"
-decl_name: "mg_send_head"
-symbol_kind: "func"
-signature: |
-  void mg_send_head(struct mg_connection *n, int status_code,
-                    int64_t content_length, const char *extra_headers);
----
-
-Send response line and headers.
-This function sends response line with the `status_code`, and automatically
-sends one header: either "Content-Length", or "Transfer-Encoding".
-If `content_length` is negative, then "Transfer-Encoding: chunked" header
-is sent, otherwise, "Content-Length" header is sent.
-
-NOTE: If `Transfer-Encoding` is `chunked`, then message body must be sent
-using `mg_send_http_chunk()` or `mg_printf_http_chunk()` functions.
-Otherwise, `mg_send()` or `mg_printf()` must be used.
-Extra headers could be set through `extra_headers` - and note `extra_headers`
-must NOT be terminated by a new line. 
-