GH645: Fix typo: ctificates -> certificates

Reviewed-by: NKurt Roeckx <kurt@openssl.org>
Signed-off-by: NRich Salz <rsalz@openssl.org>

test/CAss.cnf

@@ -36,7 +36,7 @@ certs		= $dir/certs		# Where the issued certs are kept
 crl_dir		= $dir/crl		# Where the issued crl are kept
 database	= $dir/index.txt	# database index file.
 #unique_subject	= no			# Set to 'no' to allow creation of
-					# several ctificates with same subject.
+					# several certificates with same subject.
 new_certs_dir	= $dir/newcerts		# default place for new certs.
 
 certificate	= $dir/cacert.pem 	# The CA certificate