SYNOPSIS
string get_master_uid(void)
DESCRIPTION
Return the string to be used as root-uid.
Under !strict_euids, the function is expendable.
HISTORY
Introduced in 3.2.1@40 replacing get_root_uid().
SEE ALSO
get_bb_uid(M), get_master_uid(M), uids(C), creator_file(M), creator(E)