busybox: restore some applets that aren't available as separate package

packages/busybox/build.sh

@@ -2,9 +2,9 @@ TERMUX_PKG_HOMEPAGE=https://busybox.net/
 TERMUX_PKG_DESCRIPTION="Tiny versions of many common UNIX utilities into a single small executable"
 TERMUX_PKG_LICENSE="GPL-2.0"
 TERMUX_PKG_VERSION=1.30.1
-TERMUX_PKG_REVISION=5
-TERMUX_PKG_SHA256=3d1d04a4dbd34048f4794815a5c48ebb9eb53c5277e09ffffc060323b95dfbdc
+TERMUX_PKG_REVISION=6
 TERMUX_PKG_SRCURL=https://busybox.net/downloads/busybox-${TERMUX_PKG_VERSION}.tar.bz2
+TERMUX_PKG_SHA256=3d1d04a4dbd34048f4794815a5c48ebb9eb53c5277e09ffffc060323b95dfbdc
 TERMUX_PKG_BUILD_IN_SRC=yes
 
 # We replace env in the old coreutils package:
@@ -29,11 +29,27 @@ termux_step_post_make_install() {
 		install busybox_unstripped $PREFIX/bin/busybox
 	fi
 
-	# To assist for package upgrading after https://github.com/termux/termux-packages/issues/4070.
+	# Utilities diff, mv, rm, rmdir are necessary to assist with package upgrading
+	# after https://github.com/termux/termux-packages/issues/4070.
+	#
+	# Other utilities (like crond/crontab) are useful but not available
+	# as standalone package in Termux.
+	#
+	# Few notes:
+	#
+	#  * runsv, runsvdir, sv - for things like in https://github.com/termux/termux-packages/issues/4070.
+	#  * tcpsvd - required for ftpd applet.
+	#  * vi - replaced by vim, but it still good to have basic text editor in bootstrap.
+	#
 	rm -Rf $TERMUX_PREFIX/bin/applets
 	mkdir -p $TERMUX_PREFIX/bin/applets
 	cd $TERMUX_PREFIX/bin/applets
-	for f in diff mv rm rmdir; do ln -s ../busybox $f; done
+	for f in crond crontab diff ftpd ftpget ftpput hostname inotifyd \
+		iostat lsof lsusb mpstat mv nmeter rm rmdir runsv runsvdir \
+		sendmail start-stop-daemon sv svlogd tcpsvd uptime usleep vi; do
+		ln -s ../busybox $f
+	done
+	unset f
 
 	# Install busybox man page
 	mkdir -p $TERMUX_PREFIX/share/man/man1