[FS#1413] Add full support for security hardware tokens

[LEDE Bugs]

The following task has a new comment added:

FS#1413 - Add full support for security hardware tokens
User who did this - Nathaniel Wesley Filardo (nwf)

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I have a very hackish beginning of the pkcs11-helper package, for openssl only, available and in use locally.  It may be of interest to anyone trying to do this more seriously: https://github.com/nwf/openwrt-packages/tree/pkcs-helper
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More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=1413#comment4540