RNG not initialised for sftp only under Solaris.

[mouring at etoh.eviladmin.org]

Out of the box on Solaris 2.7  using the internal entropy system.  I am
able to login but as soon as I get past the password prompt it dies
because it claims the RNG is not initialised.

Transcript:
[..]
debug: got SSH2_MSG_SERVICE_ACCEPT                                              
You have entered the land of dragons and mystical creatures.  This server       
does not exist.                                                                 
debug: authentications that can continue: publickey,keyboard-interactive,password
debug: next auth method to try is publickey                                     
debug: key does not exist: /home/lindstro/.ssh/id_dsa                           
debug: next auth method to try is keyboard-interactive                          
Password:                                                                       
debug: ssh-userauth2 successful: method keyboard-interactive                    
debug: fd 6 setting O_NONBLOCK                                                  
debug: fd 7 IS O_NONBLOCK                                                       
debug: channel 0: new [client-session]                                          
debug: send channel open 0                                                      
debug: Entering interactive session.                                            
debug: client_init id 0 arg 0                                                   
debug: Sending subsystem: sftp                                                  
debug: channel 0: open confirm rwindow 0 rmax 16384                             
RNG not initialised
[..]

The solution is to add 'init_prng();' to the main() of sftp.c.  

Why sftp is caring about such things boggles my mind. =) Scp sure does
not nor does sftp-server, and it was my impression (by glacing at the
code) that sftp.c pretty much piggy backing ontop of ssh like scp.  


Looks to be somewhere in the interactive_loop() code.

- Ben