- Set memorylocked limit to 64Kb for default login class.

This prevents unprivileged users to lock too much memory.
- Set memorylocked limit to 64Mb for daemon login class.
  Some daemons such as amd(8) and watchdogd(8) calls mlockall(2) on
  startup, they are run from init(8) which uses daemon login class.
- Set memorylocked limit to unlimited for root login class.

Suggested by:	avg
Approved by:	kib (mentor)
MFC after:	1 week

etc/login.conf

@@ -32,7 +32,7 @@ default:\
 	:cputime=unlimited:\
 	:datasize=unlimited:\
 	:stacksize=unlimited:\
-	:memorylocked=unlimited:\
+	:memorylocked=64K:\
 	:memoryuse=unlimited:\
 	:filesize=unlimited:\
 	:coredumpsize=unlimited:\
@@ -59,6 +59,7 @@ xuser:\
 staff:\
 	:tc=default:
 daemon:\
+	:memorylocked=64M:\
 	:tc=default:
 news:\
 	:tc=default:
@@ -72,6 +73,7 @@ dialer:\
 #       in preference to 'default'.
 root:\
 	:ignorenologin:\
+	:memorylocked=unlimited:\
 	:tc=default:
 
 #