[Minor] Add `application/octet-stream` mime type for `pdf` extension

The `application/octet-stream` mime type is commonly used  for `pdf` files by variety of automated mailing systems.

diff --git a/conf/modules.d/mime_types.conf b/conf/modules.d/mime_types.conf
index eb00e04c700f6f56d0d27eb3a147d66fefc65d65..e4c80e0a17c2fb8cd25a7a613e0fefbc82e28100 100644 (file)
--- a/conf/modules.d/mime_types.conf
+++ b/conf/modules.d/mime_types.conf
@@ -27,6 +27,9 @@ mime_types {
         "text/plain",
         "text/rfc822-headers"
       ];
-      pdf = "application/pdf";
+      pdf = [
+        "application/octet-stream",
+        "application/pdf"
+      ];
     }
 }