Do not drop sys_boot

This fixes #2391

AUTHORS

@@ -117,6 +117,7 @@ Marko Mikulicic <mmikulicic@gmail.com>
 Markus Fix <lispmeister@gmail.com>
 Martin Redmond <martin@tinychat.com>
 Matt Apperson <me@mattapperson.com>
+Mathieu Le Marec - Pasquet <kiorky@cryptelium.net>
 Matt Bachmann <bachmann.matt@gmail.com>
 Matthew Mueller <mattmuelle@gmail.com>
 Maxim Treskin <zerthurd@gmail.com>

lxc_template.go

@@ -113,7 +113,7 @@ lxc.mount.entry = {{$realPath}} {{$ROOTFS}}/{{$virtualPath}} none bind,{{ if ind
 #  (Note: 'lxc.cap.keep' is coming soon and should replace this under the
 #         security principle 'deny all unless explicitly permitted', see
 #         http://sourceforge.net/mailarchive/message.php?msg_id=31054627 )
-lxc.cap.drop = audit_control audit_write mac_admin mac_override mknod setpcap sys_admin sys_boot sys_module sys_nice sys_pacct sys_rawio sys_resource sys_time sys_tty_config
+lxc.cap.drop = audit_control audit_write mac_admin mac_override mknod setpcap sys_admin sys_module sys_nice sys_pacct sys_rawio sys_resource sys_time sys_tty_config
 {{end}}
 
 # limits