=item B<-addtrust arg>
-adds a trusted certificate use. Any object name can be used here
-but currently only B<clientAuth> (SSL client use), B<serverAuth>
-(SSL server use) and B<emailProtection> (S/MIME email) are used.
+adds a trusted certificate use.
+Any object name can be used here but currently only B<clientAuth> (SSL client
+use), B<serverAuth> (SSL server use), B<emailProtection> (S/MIME email) and
+B<anyExtendedKeyUsage> are used.
+As of OpenSSL 1.1.0, the last of these blocks all purposes when rejected or
+enables all purposes when trusted.
Other OpenSSL applications may define additional uses.
=item B<-addreject arg>