[bash,zsh] Skip comments in ~/.ssh/config

For the line "Host host1 # this is a comment", the current
implementation generates words in an inline comment as hostnames.
This patch removes the comment before generating the hostname.

shell/completion.bash

@@ -499,6 +499,7 @@ if ! declare -F __fzf_list_hosts > /dev/null; then
           # 16-year-old mawk unfortunately.  We need to use [ \t] instead.
           match(tolower($0), /^[ \t]*host(name)?[ \t]*[ \t=]/) {
             $0 = substr($0, RLENGTH + 1) # Remove "Host(name)?=?"
+            sub(/#.*/, "")
             for (i = 1; i <= NF; i++)
               if ($i !~ /[*?%]/)
                 print $i