Description of problem:
When creating a user via 'useradd', you cannot create a user with an uppercase
letter.  'useradd' fails with "useradd: invalid user name <username>"  For
instance, this fails for my attempt at using a username with mixed alpha and
numeric characters (A012345).

Version-Release number of selected component (if applicable):
shadow-utils-4.0.3-25.RHEL3

How reproducible:
run 'useradd' with a username that has a capital letter

Steps to Reproduce:
1.useradd A012345
2.
3.
  
Actual results:
Fails with message "useradd: invalid user name <username>"

Expected results:
Create user account

Additional info:
This but was reported in RH9 Bug 89677