Update documentation for sss_ssh_knownhostsproxy for FreeBSD-specific paths.
The current man page includes this section:
ssh(1) can be configured to use sss_ssh_knownhostsproxy for host key
authentication by using the following directives for ssh(1)
ProxyCommand /usr/bin/sss_ssh_knownhostsproxy -p %p %h
On FreeBSD, the paths should be as follows:
ProxyCommand /usr/local/bin/sss_ssh_knownhostsproxy -p %p %h