Revert "Missing perldoc markup around < literal"

This reverts commit e5c0bc6c.
Reviewed-by: NRichard Levitte <levitte@openssl.org>

doc/crypto/BN_rand.pod

@@ -33,7 +33,7 @@ non-cryptographic purposes and for certain purposes in cryptographic
 protocols, but usually not for key generation etc.
 
 BN_rand_range() generates a cryptographically strong pseudo-random
-number B<rnd> in the range 0 E<lt>= B<rnd> E<lt> B<range>.
+number B<rnd> in the range 0 <lt>= B<rnd> E<lt> B<range>.
 BN_pseudo_rand_range() does the same, but is based on BN_pseudo_rand(),
 and hence numbers generated by it are not necessarily unpredictable.