busybox: strip off ALTERNATIVES spec

Now that busybox is a known alternatives provider by opkg, we remove the
ALTERNATIVES spec and add a note to make the implicit situation clear

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

package/utils/busybox/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=busybox
 PKG_VERSION:=1.30.1
-PKG_RELEASE:=4
+PKG_RELEASE:=5
 PKG_FLAGS:=essential
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
@@ -37,6 +37,8 @@ endif
 BUSYBOX_SYM=$(if $(CONFIG_BUSYBOX_CUSTOM),CONFIG,DEFAULT)
 BUSYBOX_IF_ENABLED=$(if $(CONFIG_BUSYBOX_$(BUSYBOX_SYM)_$(1)),$(2))
 
+# All files provided by busybox will serve as fallback alternatives by opkg.
+# There should be no need to enumerate ALTERNATIVES entries here
 define Package/busybox
   SECTION:=base
   CATEGORY:=Base system
@@ -45,24 +47,6 @@ define Package/busybox
   URL:=http://busybox.net/
   DEPENDS:=+BUSYBOX_CONFIG_PAM:libpam +BUSYBOX_CONFIG_NTPD:jsonfilter
   MENU:=1
-  ALTERNATIVES:=\
-    $(call BUSYBOX_IF_ENABLED,BRCTL,	100:/usr/sbin/brctl:/bin/busybox) \
-    $(call BUSYBOX_IF_ENABLED,FIND,	100:/usr/bin/find:/bin/busybox) \
-    $(call BUSYBOX_IF_ENABLED,FLOCK,	100:/usr/bin/flock:/bin/busybox) \
-    $(call BUSYBOX_IF_ENABLED,FREE,	100:/usr/bin/free:/bin/busybox) \
-    $(call BUSYBOX_IF_ENABLED,IP,	100:/sbin/ip:/bin/busybox) \
-    $(call BUSYBOX_IF_ENABLED,KILL,	100:/bin/kill:/bin/busybox) \
-    $(call BUSYBOX_IF_ENABLED,PGREP,	100:/usr/bin/pgrep:/bin/busybox) \
-    $(call BUSYBOX_IF_ENABLED,PKILL,	100:/usr/bin/pkill:/bin/busybox) \
-    $(call BUSYBOX_IF_ENABLED,PMAP,	100:/usr/bin/pmap:/bin/busybox) \
-    $(call BUSYBOX_IF_ENABLED,PS,	100:/bin/ps:/bin/busybox) \
-    $(call BUSYBOX_IF_ENABLED,PWDX,	100:/usr/bin/pwdx:/bin/busybox) \
-    $(call BUSYBOX_IF_ENABLED,TOP,	100:/usr/bin/top:/bin/busybox) \
-    $(call BUSYBOX_IF_ENABLED,UPTIME,	100:/usr/bin/uptime:/bin/busybox) \
-    $(call BUSYBOX_IF_ENABLED,WATCH,	100:/bin/watch:/bin/busybox) \
-    $(call BUSYBOX_IF_ENABLED,WGET,	100:/usr/bin/wget:/bin/busybox) \
-    $(call BUSYBOX_IF_ENABLED,XARGS,	100:/usr/bin/xargs:/bin/busybox) \
-
 endef
 
 define Package/busybox/description