vpcs 0.6 (new formula)

The VPCS can simulate up to 9 PCs. You can ping/traceroute them, or
ping/traceroute the other hosts/routers from the virtual PCs when you
study the Cisco routers in the Dynamips. VPCS is not the traditional PC,
it is just a program running on the Linux or Windows, and only few
network commands can be used in it. But VPCS can give you a big hand
when you study the Cisco devices in the Dynamips. VPCS can replace the
routers or VMware boxes which are used as PCs in the Dynamips network.

Closes #35311.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
vpcs: add 0.6 bottle.
syncthing 0.10.14

Version bump.

Closes #35336.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
syncthing: update 0.10.14 bottle.
Upgrade to doxygen 1.8.9
doxygen: update 1.8.9 bottle.