Log Message:
security/otptool: pkg/47282: Upgrade to version 1.1.16

This package was upgraded to enable building on DragonFly.  It was
using the -r gnu sed option which DragonFly doesn't support, but
this was fixed for version 1.1.15 per pkg/47282.

Additional changes include:
Version 1.1.6 (r131) released 2 Apr 2013
    - Detect errors when writing to the new users.txt file
    - Fix (harmless) bug where new users.txt file was not being closed
    - Add -Werror configure flag to fail on compiler warnings
Version 1.1.5 (r124) released 29 Nov 2012
    - Allow building on systems without strptime(3) (e.g., Windows)
    - Add support for Apache 2.4.x