fix(main/openssh): rm ssh-agent socket file in service script

ssh-agent fails to run if the termux is force-stopped or the device is
rebooted, with error:

    unix_listener: cannot bind to path $PREFIX/var/run/ssh-agent.socket: Address already in use

Workaround it by removing the socket file before starting ssh-agent.

Author: Grimler91

packages/openssh/build.sh

@@ -3,7 +3,7 @@ TERMUX_PKG_DESCRIPTION="Secure shell for logging into a remote machine"
 TERMUX_PKG_LICENSE="BSD"
 TERMUX_PKG_MAINTAINER="Joshua Kahn @TomJo2000"
 TERMUX_PKG_VERSION="10.0p2"
-TERMUX_PKG_REVISION=7
+TERMUX_PKG_REVISION=8
 TERMUX_PKG_SRCURL=https://github.com/openssh/openssh-portable/archive/refs/tags/V_$(sed 's/\./_/g; s/p/_P/g' <<< $TERMUX_PKG_VERSION).tar.gz
 TERMUX_PKG_SHA256=a25b32645dc6b474064b9deb07afc9d8e37b127d026a1170b54feb929145140c
 TERMUX_PKG_AUTO_UPDATE=true

packages/openssh/sv/ssh-agent.run.in

@@ -7,6 +7,13 @@
 # then make use of the credentials across all terminal sessions
 
 service_agent() {
+	# If agent is not turned off before device is rebooted or
+	# termux force-stopped, then it fails to start with:
+	#   unix_listener: cannot bind to path /data/data/com.termux/files/usr/var/run/ssh-agent.socket: Address already in use
+	# Therefore unlink socket file before trying to use it
+	if [ -S "$1" ]; then
+		unlink "$1"
+	fi
 	exec ssh-agent -D -a "$1" 2>&1
 }