-generator. Multiple files can be specified separated by a OS-dependent
-character. For MS-Windows, the separator is B<;>. For OpenVMS, it's
-B<,>. For all others, it's B<:>.
+generator, or an EGD socket (see L<RAND_egd(3)|RAND_egd(3)>).
+Multiple files can be specified separated by a OS-dependent character.
+The separator is B<;> for MS-Windows, B<,> for OpenVMS, and B<:> for
+all others.
+
+=item B<-engine id>
+
+specifying an engine (by its unique B<id> string) will cause B<genrsa>
+to attempt to obtain a functional reference to the specified engine,
+thus initialising it if needed. The engine will then be set as the default
+for all available algorithms.