* sn2princ.c (krb5_sname_to_principal):
     conditionalize the use of reverse dns lookups.  The default
     is to use the existing behavior.  rdns can be disabled by
     specifying [libdefaults] rdns=false
To generate a diff of this commit:
	cvs diff -r5.417 -r5.418 krb5/src/lib/krb5/os/ChangeLog
	cvs diff -r5.37 -r5.38 krb5/src/lib/krb5/os/sn2princ.c