+SSLeay_version() returns different strings depending on B<t>:
+
+=over 4
+
+=item SSLEAY_VERSION
+The text variant of the version number and the release date. For example,
+"OpenSSL 0.9.5a 1 Apr 2000".
+
+=item SSLEAY_CFLAGS
+The flags given to the C compiler when compiling OpenSSL are returned in a
+string.
+
+=item SSLEAY_PLATFORM
+The platform name used when OpenSSL was configured is returned.
+
+=back
+
+If the data request isn't available, a text saying that the information is
+not available is returned.
+
+For an unknown B<t>, the text "not available" is returned.
+