chat, pppoed: Move to the ppp package

MFC after:	1 day
Reviewed by:	manu
Differential Revision:	https://reviews.freebsd.org/D52650

libexec/pppoed/Makefile

@@ -1,3 +1,4 @@
+PACKAGE=ppp
 PROG=	pppoed
 LIBADD=	netgraph
 MAN=	pppoed.8

libexec/rc/rc.d/Makefile

@@ -50,7 +50,6 @@ CONFS=	DAEMON \
 	${_nscd} \
 	${_opensm} \
 	os-release \
-	pppoed \
 	pwcheck \
 	quota \
 	random \
@@ -130,6 +129,10 @@ CONFGROUPS+=		POWERD
 POWERD=			powerd
 POWERDPACKAGE=		powerd
 
+CONFGROUPS+=		PPPOED
+PPPOED=			pppoed
+PPPOEDPACKAGE=		ppp
+
 CONFGROUPS+=		SYSLOGD
 SYSLOGD=		syslogd
 SYSLOGDPACKAGE=		syslogd

usr.bin/chat/Makefile

@@ -1,6 +1,7 @@
 # I once used this extensively, but no longer have a modem.  Feel free
 # to ask me questions about it, but I disclaim ownership now.  -Peter
 
+PACKAGE=ppp
 PROG=	chat
 MAN=	chat.8