vstr: 1.0.15 - Vstr an ISO C string library

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
strongswan: 5.1.0 - strongSwan IPsec based VPN

This is the first strongSwan version that supports virtual IP addresses
on Mac OS X, making it finally usable in common client access (aka
road-warrior) scenarios.

As the Mac OS X kernel does not support AES-GCM it comes with an
optional userland IPsec implementation that provides support for the
Suite B cryptographic suite of algorithms.

The configure options are currently trimmed for use in client scenarios.

Closes #20941.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>