Fixes #5401: Create a shell script that list all .cf files compatible wi...

...th a given cf-agent version.
These commands are vulnerable to an unexpected version number - for example:

```
$ echo 3.6.1 | sed -e 's/\([0-9]\+\)\.\([0-9]\+\)/\1/'
3.1
```

I suggest you add ```.*``` at the end of the first part of the s/// command, like this:

```
cfengine_major=`echo ${cfengine_version} | ${sed_command} -e 's/\([0-9]\+\)\.\([0-9]\+\).*/\1/'`
```