fingerprint art

[mbays at sdf.org]

The pictures were wrong in my original post, sorry, I was accidentally 
rehashing the hash; in case anyone wants to use them to test their own 
implementation, I believe the correct pictures should be:

```
   +-----[X509]------+         +-----[X509]------+
   |      ..+ooO++   |         |  .*+*o.   .     |
   |       .++Bo+ +  |         |  ..B.. . o . .. |
   |      . oO o.+ o |         |     o . E . ....|
   |       *=.= o o .|         |    ..o + o .o o.|
   |      *.^*E... . |         |    o.oo^..o+.o  |
   |     . +.Boo .   |   >>>   |   . = o.+....   |
   |        o . .    |         |    + * . +      |
   |         o       |         |     B + . .     |
   |        .        |         |    ..=..        |
   +----[SHA256]-----+         +----[SHA256]-----+
Let's Encrypt Authority     gemini.circumlunar.spac
   Expires 2021-03-17          Expires 2020-08-01
```