Dots seem to cause problems in entry names
Steve Timm noticed problems when using entry names like:
"FNAL_HEPCLOUD_AWS_us-east-1a_m3.2xlarge", including a dot.
They "have seen some stuff that was unhappy because of this".
The goal of this ticket is to:
- verify what is the problem and why
- solve it if it is easy (to allow dots in the names)
- otherwise document that entry names cannot include dots (list the valid characters for entry names)