SAM node files support (from CRTE V11.0A)

With CRTE versions from V11.0A SAM node files can be created and edited as a text file. For the creation, a corresponding command must be set beforehand:
/CREATE-FILE FILE-NAME=filename, SUPPORT=*PUBLIC-DISK(STORAGE-TYPE=*NET-STORAGE(FILE-TYPE=*NODE-FILE)).
Additionally an ADD-FILE-LINK-command is needed because the file can only be opened via a link.

Functions that return a recovery address are not allowed for SAM node files.
These are fgetpos, fgetpos64, ftell, ftell64, ftello, ftello64, tell and lseek and lseek64 for value SEEK_CUR. They return an error return code and the ERRNO is set to the value ENOSYS.