Include option '--tmp-dir' to define the temporary directory

Signed-off-by: Richard T Bonhomme <tincantech@protonmail.com>

easyrsa3/easyrsa

@@ -232,7 +232,8 @@ General options:
 
 --passin=ARG    : set -passin ARG for openssl
 --passout=ARG   : set -passout ARG for openssl
---pki-dir=DIR   : declares the PKI directory
+--pki-dir=DIR   : declare the PKI directory
+--tmp-dir=DIR   : declare the temporary directory
 --ssl-conf=FILE : define a specific OpenSSL config file for Easy-RSA to use
 --vars=FILE     : define a specific 'vars' file to use for Easy-RSA config
 --version       : prints EasyRSA version and build information, then exits
@@ -2984,6 +2985,8 @@ while :; do
 		;;
 	--pki-dir)
 		export EASYRSA_PKI="$val" ;;
+	--tmp-dir)
+		export EASYRSA_TEMP_DIR="$val" ;;
 	--ssl-conf)
 		export EASYRSA_SSL_CONF="$val" ;;
 	--use-algo)