parameter validation #407

dkms needs to perform more parameter validation on things that end up as path components

parameters can come from

• command line
• dkms.conf (package and various local override files)
• framework.conf

Possible bad stuff that can be contained:

• leading/trailing whitespace
• embedded whitespace
• embedded funny characters (can we restrict everything to a subset of 7-bit ascii or do we need to allow <emoji>.ko for linux-1.2.3-e<moj>i?)
• slashes in module names, module versions, kernel versions, architectures
• .. in paths