Проблема в создании OpenSSL сертификата для Dovecot (POP3-сервера)

Добрый день!
На официальном сайте dovecot http://wiki.dovecot.org/SSL/CertificateCreation
можно скачать срипт mkcert.sh и dovecot-openssl.cnf
Листинг срипта:
# Generates a self-signed certificate.
# Edit dovecot-openssl.cnf before running this.
OPENSSL=${OPENSSL-openssl}
SSLDIR=${SSLDIR-/etc/ssl}
OPENSSLCONFIG=${OPENSSLCONFIG-dovecot-openssl.cnf}
CERTDIR=$SSLDIR/certs
KEYDIR=$SSLDIR/private
CERTFILE=$CERTDIR/dovecot.pem
KEYFILE=$KEYDIR/dovecot.pem
if [ ! -d $CERTDIR ]; then
echo "$SSLDIR/certs directory doesn't exist"
exit 1
fi
if [ ! -d $KEYDIR ]; then
echo "$SSLDIR/private directory doesn't exist"
exit 1
fi
if [ -f $CERTFILE ]; then
echo "$CERTFILE already exists, won't overwrite"
exit 1
fi
if [ -f $KEYFILE ]; then
echo "$KEYFILE already exists, won't overwrite"
exit 1
fi
$OPENSSL req -new -x509 -nodes -config $OPENSSLCONFIG -out $CERTFILE -keyout $KEYFILE -days 365 || exit 2
chmod 0600 $KEYFILE
echo
$OPENSSL x509 -subject -fingerprint -noout -in $CERTFILE || exit 2

А вот листинг dovecot-openssl.cnf:
[ req ]
default_bits = 1024
encrypt_key = yes
distinguished_name = req_dn
x509_extensions = cert_type
prompt = no
[ req_dn ]
# country (2 letter code)
#C=FI
# State or Province Name (full name)
#ST=
# Locality Name (eg. city)
#L=Helsinki
# Organization (eg. company)
#O=Dovecot
# Organizational Unit Name (eg. section)
OU=IMAP server
# Common Name (*.example.com is also possible)
CN=imap.example.com
# E-mail contact
emailAddress=postmaster@example.com
[ cert_type ]
nsCertType = server

Проблема заключается в том, что OpenSSL не понимает команду x509.
Листинг ошибки:
/etc/dovecot\n
openssl\n
openssl req -new -x509 -nodes -config /etc/dovecot/dovecot-openssl.cnf -out /etc/dovecot/certs/dovecot.pem -keyout /etc/dovecot/private/dovecot.pem -days 365 || exit 2
Error Loading extension section cert_type
7887:error:2206506F:X509 V3 routines:v2i_ASN1_BIT_STRING:unknown bit string argument:v3_bitst.c:132:section:,name:test,value:
7887:error:22098080:X509 V3 routines:X509V3_EXT_nconf:error in extension:v3_conf.c:93:name=nsCertType, value=test

Каким образом можно это подключить, либо заменить, чтобы сделать сертификат dovecot.pem?