1.2
Added setting COMP_KNOWN_HOSTS_WITH_HOSTFILE `_known_hosts_real' will add hosts from HOSTFILE (compgen -A hostname), unless `COMP_KNOWN_HOSTS_WITH_HOSTFILE' is set to an empty value.
Use --asciidoc-opts="--unsafe" instead of --unsafe for a2x for compatibility with asciidoc < 8.4.5.
Line length: 72 -> 79 as discussed on list.
(doc) Add reference to Tcl Style Guide.