hst/grp_pwd: specify new uid format

This leaves slots available for additional uid ranges in Rosa OS.

This breaks all existing installations! Users are required to fix ownership manually.

Closes #18.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/store/store_test.go

@@ -339,7 +339,7 @@ func TestStoreAll(t *testing.T) {
 
 			{ID: (hst.ID)(bytes.Repeat([]byte{0xfe}, len(hst.ID{}))), PID: 0xbed, ShimPID: 0xfff, Config: func() *hst.Config {
 				template := hst.Template()
-				template.Identity = hst.IdentityMax
+				template.Identity = hst.IdentityEnd
 				return template
 			}(), Time: time.Unix(0, 0xcafebabe0)},
 			{ID: (hst.ID)(bytes.Repeat([]byte{0xfc}, len(hst.ID{}))), PID: 0x1bed, ShimPID: 0x1fff, Config: func() *hst.Config {