Don't say that swapping is configured by config.

usr.sbin/config/Makefile

@@ -1,7 +1,7 @@
 # 	@(#)Makefile	8.1 (Berkeley) 6/6/93
 
 PROG=	config
-CFLAGS+=-I. -I${.CURDIR}
+CFLAGS+=-I. -I${.CURDIR} -I${.CURDIR}/../sys
 SRCS=	config.c main.c lang.c mkioconf.c mkmakefile.c mkglue.c mkheaders.c \
 	mkoptions.c mkswapconf.c
 MAN8=	config.8

usr.sbin/config/config.8

@@ -138,10 +138,10 @@ in building the system;
 header files,
 definitions of
 the number of various devices that will be compiled into the system;
-swap configuration files,
+so-called swap configuration files,
 definitions for
-the disk areas to be used for swapping, the root file system,
-argument processing, and system dumps.
+the disk areas to be used for the root file system
+and system dumps.
 .Pp
 After running
 .Nm config ,