Support stdout when saving the xml.
Support stdout when saving the xml.

Historic feature. I am not sure if it can be dropped.

Addressing failing distcheck caused by test_api_syschar.c
creating `./-' file.

ybznek/openscap,ybznek/openscap,ybznek/openscap,isimluk/openscap,redhatrises/openscap,postfix/openscap,isimluk/openscap,mpreisler/openscap,OpenSCAP/openscap,openprivacy/openscap,postfix/openscap,ybznek/openscap,Hexadorsimal/openscap,postfix/openscap,jan-cerny/openscap,openprivacy/openscap,Hexadorsimal/openscap,Hexadorsimal/openscap,jan-cerny/openscap,Hexadorsimal/openscap,OpenSCAP/openscap,OpenSCAP/openscap,OpenSCAP/openscap,OpenSCAP/openscap,redhatrises/openscap,ybznek/openscap,jan-cerny/openscap,jan-cerny/openscap,mpreisler/openscap,ybznek/openscap,isimluk/openscap,postfix/openscap,openprivacy/openscap,jan-cerny/openscap,Hexadorsimal/openscap,isimluk/openscap,redhatrises/openscap,isimluk/openscap,postfix/openscap,redhatrises/openscap,mpreisler/openscap,jan-cerny/openscap,openprivacy/openscap,isimluk/openscap,Hexadorsimal/openscap,postfix/openscap,openprivacy/openscap,OpenSCAP/openscap,mpreisler/openscap,openprivacy/openscap,mpreisler/openscap,redhatrises/openscap,mpreisler/openscap,redhatrises/openscap