If you can safely assume that /etc/ssh/sshd_config.d exists you can simply add
it to the list of files scanned for HostKey.
---
debian/openssh-server.postinst | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/debian/openssh-server.postinst b/debian/openssh-server.postinst
index f45f5851c..aa4bee899 100644
--- a/debian/openssh-server.postinst
+++ b/debian/openssh-server.postinst
@@ -18,7 +18,7 @@ get_config_option() {
perl -lne '
s/[[:space:]]+/ /g; s/[[:space:]]+$//;
print if s/^[[:space:]]*'"$option"'[[:space:]=]+//i' \
- /etc/ssh/sshd_config
+ /etc/ssh/sshd_config /etc/ssh/sshd_config.d/*
}
--
2.29.2
