Redmine

As discussed in #5877 a project identifier cannot be composed of only numbers. As of version 2.2.2.stable the instructional text below the project identifier field still fails to mention this:

Length between 1 and 100 characters. Only lower case letters (a-z), numbers, dashes and underscores are allowed.

This text needs to be revised to explicitly indicate identifiers cannot be composed of only numbers. I suggest:

Length of 1 to 100 characters. Lower case letters (a-z), numbers, dashes and underscores are allowed but cannot contain only numbers.