sys-user.eclass: add a sys-user_modify() function.
drwxr-xr-x - dev-perl
drwxr-xr-x - eclass
drwxr-xr-x - media-gfx
drwxr-xr-x - metadata
drwxr-xr-x - profiles
-rw-r--r-- 237 skel.ebuild
-rw-r--r-- 533 skel.metadata.xml
drwxr-xr-x - sys-group
drwxr-xr-x - sys-user