Use xmlto; add to 'clean' target.

[exim.git] / doc / doc-docbook / spec.xfpt

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 9c03523bb828dfe8b9c619843754aa62030f0475..92d0a22879211a7b191de4e1d15406cdd04b08c1 100644 (file)
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -16066,6 +16066,9 @@ use OpenSSL with a directory.
 
 See &<<SECTtlssni>>& for discussion of when this option might be re-expanded.
 
+A forced expansion failure or setting to an empty string is equivalent to
+being unset.
+
 
 .option tls_verify_hosts main "host list&!!" unset
 .cindex "TLS" "client certificate verification"