allow omitting filename from upload entirely

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/base-apis.js

@@ -1071,6 +1071,10 @@ MatrixBaseApis.prototype.searchUserDirectory = function(opts) {
  * @param {string=} opts.name   Name to give the file on the server. Defaults
  *   to <tt>file.name</tt>.
  *
+ * @param {boolean=} opts.omitFilename if true will not send the filename,
+ *   e.g for encrypted file uploads where filename leaks are undesirable.
+ *   Defaults to false.
+ *
  * @param {string=} opts.type   Content-type for the upload. Defaults to
  *   <tt>file.type</tt>, or <tt>applicaton/octet-stream</tt>.
  *