8160997: Solaris: deprecated <pwd.h> and <gid.h> interfaces should be replaced
Summary: Use final POSIX 1003.1c versions of getgrgid_r(), getgrnam_r(), getpwnam_r(), and getpwuid_r().
Reviewed-by: alanb, dcubed, simonis, dholmes
Contributed-by: alan.burlison@oracle.com