socks proxy support

[douglas.manton at uk.ibm.com]

I have successfully followed the instructions at the NEC socks site to
socksify openssh.  I did it as follows:

        - Compile and install libsocks
        - Configure openssh as normal
        - Edit Makefile and change CFLAGS to include -DSOCKS,
                change LIBS to include -lsocks5
        - Edit config.h and add #include <socks.h>

Each compilation unit will complain that certain functions are being
redefined, but the end result will work through socks using the file
/etc/libsocks5.conf as reference.  Since runsocks does not exist for AIX I
have found this the easiet and quickest way to get socks support.

Best wishes,
--------------------------------------------------------
 Doug Manton, AT&T EMEA Firewall and Security Solutions

                   demanton at att.com
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"If privacy is outlawed, only outlaws will have privacy"