Fix shell IPv6 testing (for -e).

cdist/conf/type/__file/gencode-local

@@ -67,8 +67,7 @@ DONE
       if [ "$upload_file" ]; then
          echo upload >> "$__messages_out"
          # IPv6 fix
-         echo "${__target_host}" | grep -q -E '^[0-9a-fA-F:]+$'
-         if [ $? -eq 0 ]
+         if $(echo "${__target_host}" | grep -q -E '^[0-9a-fA-F:]+$')
          then
              my_target_host="[${__target_host}]"
          else

cdist/conf/type/__jail_freebsd10/gencode-local

@@ -44,8 +44,7 @@ basepresent="$(cat "$__object/explorer/basepresent")"
 if [ "$state" = "present" ]; then
    if [ "$basepresent" = "NONE" ]; then
      # IPv6 fix
-     echo "${__target_host}" | grep -q -E '^[0-9a-fA-F:]+$'
-     if [ $? -eq 0 ]
+     if $(echo "${__target_host}" | grep -q -E '^[0-9a-fA-F:]+$')
      then
          my_target_host="[${__target_host}]"
      else

cdist/conf/type/__jail_freebsd9/gencode-local

@@ -40,8 +40,7 @@ basepresent="$(cat "$__object/explorer/basepresent")"
 if [ "$state" = "present" ]; then
    if [ "$basepresent" = "NONE" ]; then
      # IPv6 fix
-     echo "${__target_host}" | grep -q -E '^[0-9a-fA-F:]+$'
-     if [ $? -eq 0 ]
+     if $(echo "${__target_host}" | grep -q -E '^[0-9a-fA-F:]+$')
      then
          my_target_host="[${__target_host}]"
      else

cdist/conf/type/__pf_ruleset/gencode-local

@@ -60,8 +60,7 @@ case $uname in
 esac
 
 # IPv6 fix
-echo "${__target_host}" | grep -q -E '^[0-9a-fA-F:]+$'
-if [ $? -eq 0 ]
+if $(echo "${__target_host}" | grep -q -E '^[0-9a-fA-F:]+$')
 then
     my_target_host="[${__target_host}]"
 else