xbps-src: use XBPS_LIBEXECDIR and XBPS_SHAREDIR in all scripts that need substs.

xbps-src/libexec/chroot-helper.sh.in

@@ -55,7 +55,7 @@ mount_chroot_fs()
 				continue
 			fi
 			[ ! -d ${blah} ] && echo "failed." && continue
-			@@XBPS_INSTALL_LIBEXECDIR@@/capmount \
+			${XBPS_LIBEXECDIR}/capmount \
 				${dowrite} ${blah} ${MASTERDIR}/${f} \
 				2>/dev/null
 			if [ $? -eq 0 ]; then
@@ -85,7 +85,7 @@ umount_chroot_fs()
 			echo ${cnt} > ${MASTERDIR}/.${fs}_mount_bind_done
 		else
 			echo -n "=> Unmounting ${fs} from chroot... "
-			@@XBPS_INSTALL_LIBEXECDIR@@/capumount \
+			${XBPS_LIBEXECDIR}/capumount \
 				${MASTERDIR} ${fs} 2>/dev/null
 			if [ $? -eq 0 ]; then
 				rm -f ${MASTERDIR}/.${fs}_mount_bind_done

xbps-src/libexec/doinst-helper.sh.in

@@ -28,23 +28,13 @@ PKG_TMPLNAME="$1"
 
 if [ -n "${CONFIG_FILE}" -a -r "${CONFIG_FILE}" ]; then
 	. ${CONFIG_FILE}
-else
-	if [ -n "$IN_CHROOT" ]; then
-		. /usr/local/etc/xbps-src.conf
-	else
-		. @@XBPS_INSTALL_ETCDIR@@/xbps-src.conf
-	fi
 fi
 
 if [ -n "${MASTERDIR}" ]; then
 	export XBPS_MASTERDIR="${MASTERDIR}"
 fi
 
-if [ -n "$IN_CHROOT" ]; then
-	. /usr/local/share/xbps-src/shutils/init_funcs.sh
-else
-	. @@XBPS_INSTALL_SHAREDIR@@/shutils/init_funcs.sh
-fi
+. ${XBPS_SHAREDIR}/shutils/init_funcs.sh
 
 set_defvars