[Bug 3433470] Regenerated the certificates, again. Expiry is Jan 2023
(10 years).  While SimpleCA doesn't seem to allow me to specify a
longer period in the GUI it was possible to get, update and run the
Tcl code, unwrapped.  Further changed to 4096-bit certs.
Regenerated the certificates here again, 10 years at 1024 bit. The issue with [7b80198969] seems to have been that I extended the Root cert validity to 100 years, and that screwed something up. With the root certs now back to 10 years (+10 days) validity, things are fine. I suspect that I may have run into the Y2038 problem in either Tcl and/or openssl.
Merge latest certs from trunk into the RC work.