pull up r18420 from trunk

pull up r18420 from trunk

 r18420@cathode-dark-space:  tlyu | 2006-08-08 15:26:40 -0400
 ticket: new
 subject: fix MITKRB5-SA-2006-001: multiple local privilege escalation vulnerabilities
 target_version: 1.5.1
 tags: pullup

 	* src/appl/gssftp/ftpd/ftpd.c (getdatasock, passive):
 	* src/appl/bsd/v4rcp.c (main):
 	* src/appl/bsd/krcp.c (main):
 	* src/appl/bsd/krshd.c (doit):
 	* src/appl/bsd/login.c (main):
 	* src/clients/ksu/main.c (sweep_up):
 	* src/lib/krb4/kuserok.c (kuserok): Check return values from
 	setuid() and related functions to avoid privilege escalation
 	vulnerabilities.  Fixes MITKRB5-SA-2006-001. [CVE-2006-3083,
 	VU#580124, CVE-2006-3084, VU#401660]

ticket: 4125
version_fixed: 1.5.1

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-5@18421 dc483132-0cff-0310-8789-dd5450dbe970