add support to sshd_config.d

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 - [ ] I have read the [contributing](https://github.com/linuxserver/docker-openssh-server/blob/master/.github/CONTRIBUTING.md) guideline and understand that I have made the correct modifications

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Author: tg123

root/etc/s6-overlay/s6-rc.d/init-openssh-server-config/run

@@ -33,18 +33,18 @@ echo "${USER_NAME}:${USER_PASSWORD}" | chpasswd
 # Migration
 if [[ -f /config/ssh_host_keys/sshd_config ]]; then
     mv /config/ssh_host_keys/sshd_config /config/sshd/sshd_config
-    sed -i 's/Include \/etc\/ssh\/sshd_config.d\/\*.conf/#Include \/etc\/ssh\/sshd_config.d\/\*.conf/' /config/sshd/sshd_config
     echo "This file has been moved to /config/sshd/sshd_config" > /config/ssh_host_keys/sshd_config_README
     chmod 600 /config/ssh_host_keys/ssh_host_*_key
     chmod 644 /config/ssh_host_keys/ssh_host_*_key.pub
 fi
 
 if [[ ! -f /config/sshd/sshd_config ]]; then
     sed -i '/#PidFile/c\PidFile \/config\/sshd.pid' /etc/ssh/sshd_config
-    sed -i 's/Include \/etc\/ssh\/sshd_config.d\/\*.conf/#Include \/etc\/ssh\/sshd_config.d\/\*.conf/' /etc/ssh/sshd_config
     cp -a /etc/ssh/sshd_config /config/sshd/sshd_config
 fi
 
+sed -i 's/Include \/etc\/ssh\/sshd_config.d\/\*.conf/Include \/config\/sshd\/sshd_config.d\/\*.conf/' /config/sshd/sshd_config
+
 if [[ ! -d /config/ssh_host_keys ]]; then
     mkdir -p /config/ssh_host_keys
     ssh-keygen -A