verify that the openssl binary is emitting a valid s_client -help.

This catches instances where the wrong openssl binary is selected (for
instance, if uname -s is neither Darwin nor Linux) and serves as a
simple up-front test to make sure that openssl is working before we
proceed further into the script.

cipherscan

@@ -20,6 +20,10 @@ else
     OPENSSLBIN="${REALPATH}/openssl"
 fi
 OPENSSLBINHELP="$($OPENSSLBIN s_client -help 2>&1)"
+if ! [[ $OPENSSLBINHELP =~ -connect ]]; then
+    echo "$OPENSSLBIN s_client doesn't accept the -connect parameter, which is extremely strange; refusing to proceed." 1>&2
+    exit 1
+fi
 
 # cipherscan requires bash4, which doesn't come by default in OSX
 if [[ ${BASH_VERSINFO[0]} -lt 4 ]]; then