AIX issue using chroot

[Corey Stup]

Took a while to figure this one out:

Since "use chroot" defaults to true, I was having issues of UID/GID's
not mapping between servers.   On AIX, if chroot() is called, the
getpwuid() calls fail, no longer being able to find /etc/passwd.   
Since the that call doesn't differentiate between a 'failure' and a
'unable to map uid', rsync assumes it can't map the UID and the server
side doesn't send the maps.

Setting "use chroot" to false is a workaround.   Not sure if there is an
easy way to fix this, or its just a caveat that might want to be stated
in the documentation.

Also, I would be happy to provide builds of rsync for AIX4.1.5 and
4.3.3.