openssh: add script "sftpa" - works similary to "ssha"

SFTP with SSH agent.

packages/openssh/build.sh

@@ -2,7 +2,7 @@ TERMUX_PKG_HOMEPAGE=https://www.openssh.com/
 TERMUX_PKG_DESCRIPTION="Secure shell for logging into a remote machine"
 TERMUX_PKG_LICENSE="BSD"
 TERMUX_PKG_VERSION=7.9p1
-TERMUX_PKG_REVISION=3
+TERMUX_PKG_REVISION=4
 TERMUX_PKG_SHA256=6b4b3ba2253d84ed3771c8050728d597c91cfce898713beb7b64a305b6f11aad
 TERMUX_PKG_SRCURL=https://fastly.cdn.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-${TERMUX_PKG_VERSION}.tar.gz
 TERMUX_PKG_DEPENDS="libandroid-support, ldns, openssl, libedit, libutil, termux-auth, krb5"
@@ -68,6 +68,7 @@ termux_step_post_make_install () {
 	printf "PubkeyAcceptedKeyTypes +ssh-dss\nSendEnv LANG\n" > $TERMUX_PREFIX/etc/ssh/ssh_config
 	cp $TERMUX_PKG_BUILDER_DIR/source-ssh-agent.sh $TERMUX_PREFIX/bin/source-ssh-agent
 	cp $TERMUX_PKG_BUILDER_DIR/ssh-with-agent.sh $TERMUX_PREFIX/bin/ssha
+	cp $TERMUX_PKG_BUILDER_DIR/sftp-with-agent.sh $TERMUX_PREFIX/bin/sftpa
 
 	# Install ssh-copy-id:
 	cp $TERMUX_PKG_SRCDIR/contrib/ssh-copy-id.1 $TERMUX_PREFIX/share/man/man1/

packages/openssh/sftp-with-agent.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+
+. source-ssh-agent
+sftp "$@"