Add ipv6 patterns to ignore list of host completion

Make FQDN match restricted to valid hostname characters only
Tweak description for tag-order

modules/completion/init.zsh

@@ -131,11 +131,11 @@ if [[ -s ~/.mutt/aliases ]]; then
 fi
 
 # SSH/SCP/RSYNC
-zstyle ':completion:*:(scp|rsync):*' tag-order 'hosts:-host hosts:-domain:domain hosts:-ipaddr:ip\ address *'
+zstyle ':completion:*:(scp|rsync):*' tag-order 'hosts:-host:host hosts:-domain:domain hosts:-ipaddr:ip\ address *'
 zstyle ':completion:*:(scp|rsync):*' group-order users files all-files hosts-domain hosts-host hosts-ipaddr
-zstyle ':completion:*:ssh:*' tag-order users 'hosts:-host hosts:-domain:domain hosts:-ipaddr:ip\ address *'
+zstyle ':completion:*:ssh:*' tag-order users 'hosts:-host:host hosts:-domain:domain hosts:-ipaddr:ip\ address *'
 zstyle ':completion:*:ssh:*' group-order hosts-domain hosts-host users hosts-ipaddr
-zstyle ':completion:*:(ssh|scp|rsync):*:hosts-host' ignored-patterns '*.*' loopback localhost
-zstyle ':completion:*:(ssh|scp|rsync):*:hosts-domain' ignored-patterns '<->.<->.<->.<->' '^*.*' '*@*'
-zstyle ':completion:*:(ssh|scp|rsync):*:hosts-ipaddr' ignored-patterns '^<->.<->.<->.<->' '127.0.0.<->'
+zstyle ':completion:*:(ssh|scp|rsync):*:hosts-host' ignored-patterns '*(.|:)*' loopback localhost broadcasthost ip6-loopback ip6-localhost
+zstyle ':completion:*:(ssh|scp|rsync):*:hosts-domain' ignored-patterns '<->.<->.<->.<->' '^[-[:alnum:]]##(.[-[:alnum:]]##)##' '*@*'
+zstyle ':completion:*:(ssh|scp|rsync):*:hosts-ipaddr' ignored-patterns '^(<->.<->.<->.<->|(|::)([[:xdigit:].]##:(#c,2))##(|%*))' '127.0.0.<->' '255.255.255.255' '::1' 'fe80::*'