rc.d standardization patch

[Kevin L. Kane]

There is quite a bit of non standardness in the rc.d system and this
aims to get us a little closer to the way NetBSD does things and
towards 'normalcy'.
rename start_vinum -> vinum, enable_quotas -> quotas
remove all instances of _enable
respect configs that use old names with _enable but output a warning
saying _enable is deprecated.
kerberos5, kadmind, kpasswd had the program path in a nonstandard
variable added _program variable which seems to be the standard.
These 3 had _server in the name i removed that as well to make
translation between the old config and new config possible.
here is the diff: http://www.uberstyle.net/~kevin/rcenable.diff

If there are any suggestions for renaming and cleaning up other rcvar
names let me know and ill add them in to this patch.
--
Kevin L. Kane
kevin.kane at gmail.com