allow custom service name for sshd on Cygwin

Permits the use of multiple sshd running with different service names.

Patch by Florian Friesdorf via Corinna Vinschen

contrib/cygwin/ssh-host-config

@@ -61,6 +61,7 @@ LOCALSTATEDIR=/var
 
 sshd_config_configured=no
 port_number=22
+service_name=sshd
 strictmodes=yes
 privsep_used=yes
 cygwin_value=""
@@ -408,7 +409,7 @@ install_service() {
   local ret=0
 
   echo
-  if /usr/bin/cygrunsrv -Q sshd >/dev/null 2>&1
+  if /usr/bin/cygrunsrv -Q ${service_name} >/dev/null 2>&1
   then
     csih_inform "Sshd service is already installed."
     check_service_files_ownership "" || let ret+=$?
@@ -464,7 +465,7 @@ install_service() {
       fi
       if [ -z "${password}" ]
       then
-	if /usr/bin/cygrunsrv -I sshd -d "CYGWIN sshd" -p /usr/sbin/sshd \
+	if /usr/bin/cygrunsrv -I ${service_name} -d "CYGWIN ${service_name}" -p /usr/sbin/sshd \
 			      -a "-D" -y tcpip "${cygwin_env[@]}"
 	then
 	  echo
@@ -474,20 +475,20 @@ install_service() {
 	  csih_inform "will start automatically after the next reboot."
 	fi
       else
-	if /usr/bin/cygrunsrv -I sshd -d "CYGWIN sshd" -p /usr/sbin/sshd \
+	if /usr/bin/cygrunsrv -I ${service_name} -d "CYGWIN ${service_name}" -p /usr/sbin/sshd \
 			      -a "-D" -y tcpip "${cygwin_env[@]}" \
 			      -u "${run_service_as}" -w "${password}"
 	then
 	  /usr/bin/editrights -u "${run_service_as}" -a SeServiceLogonRight
 	  echo
 	  csih_inform "The sshd service has been installed under the '${run_service_as}'"
-	  csih_inform "account.  To start the service now, call \`net start sshd' or"
-	  csih_inform "\`cygrunsrv -S sshd'.  Otherwise, it will start automatically"
+	  csih_inform "account.  To start the service now, call \`net start ${service_name}' or"
+	  csih_inform "\`cygrunsrv -S ${service_name}'.  Otherwise, it will start automatically"
 	  csih_inform "after the next reboot."
 	fi
       fi
 
-      if /usr/bin/cygrunsrv -Q sshd >/dev/null 2>&1
+      if /usr/bin/cygrunsrv -Q ${service_name} >/dev/null 2>&1
       then
 	check_service_files_ownership "${run_service_as}" || let ret+=$?
       else
@@ -561,6 +562,11 @@ do
     shift
     ;;
 
+  -N | --name )
+    service_name=$1
+    shift
+    ;;
+
   -p | --port )
     port_number=$1
     shift
@@ -590,6 +596,7 @@ do
     echo "  --yes    -y            Answer all questions with \"yes\" automatically."
     echo "  --no     -n            Answer all questions with \"no\" automatically."
     echo "  --cygwin -c <options>  Use \"options\" as value for CYGWIN environment var."
+    echo "  --name   -N <name>     sshd windows service name."
     echo "  --port   -p <n>        sshd listens on port n."
     echo "  --user   -u <account>  privileged user for service, default 'cyg_server'."
     echo "  --pwd    -w <passwd>   Use \"pwd\" as password for privileged user."