** Description changed:

+ TEST CASE:
+ 
  $PATH isn't sourced from /etc/environment, instead the version in
  /etc/login.defs is used.  (The example below comes from a precise install.)
  
  | james@panlong:~$ echo $PATH
  | /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
  | james@panlong:~$ sudo su - buildd
  | buildd@panlong:~$ echo $PATH
  | /usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games
  | buildd@panlong:~$ cat /etc/environment
  | 
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games"
  | buildd@panlong:~$ grep PATH /etc/login.defs
  | # Three items must be defined:  MAIL_DIR, ENV_SUPATH, and ENV_PATH.
  | # *REQUIRED*  The default PATH settings, for superuser and normal users.
  | ENV_SUPATH      
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
  | ENV_PATH        
PATH=/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games
  | #CRACKLIB_DICTPATH
  | buildd@panlong:~$ sudo sed -i -e "s#^ENV_PATH.*#ENV_PATH        
PATH=/wtf:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games#" 
/etc/login.defs
  | buildd@panlong:~$ logout
  | james@panlong:~$ sudo su - buildd
  | buildd@panlong:~$ echo $PATH
  | /wtf:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games
  | buildd@panlong:~$
  
  REGRESSION POTENTIAL:
  - medium: it changes (incorrect) existing behaviour so https://xkcd.com/1172/ 
may apply

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https://bugs.launchpad.net/bugs/984390

Title:
  $PATH is taken from login.defs not /etc/environment

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