route-update: fix domain detection for IPv6 IP-only lists

[a-zA-Z] matches hex digits a-f in IPv6 addresses, causing IP-only lists like antifilter-ip6 (127k entries) to be treated as domain lists. This triggered useless history merge (sort -u on ~2.5M lines = 77 min) and DNS resolution attempts. Use [g-zG-Z] instead, which correctly distinguishes domain names from IPv6 hex notation. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

route-update: fix domain detection for IPv6 IP-only lists
0e2b2430 · Vitaly Lipatov · 775d24e5 · 0e2b2430
Commit 0e2b2430 authored Mar 05, 2026 by Vitaly Lipatov
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route-update.sh router/route-update.sh +3 -3

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--- a/router/route-update.sh
+++ b/router/route-update.sh
@@ -524,7 +524,7 @@ resolve_list_file()
    vlog "$_tag$_label resolving..."
    > "$_resolved_new.tmp"
-    if grep -v '^#' "$_f" | grep -q '[a-zA-Z]' ; then
+    if grep -v '^#' "$_f" | grep -q '[g-zG-Z]' ; then
        cat_expanded "$_f" | grep -v '^#' | grep -v '^$' | $_resolve_func | \
            grep -v '^#' | grep -v '^$' >> "$_resolved_new.tmp"
    else
@@ -553,7 +553,7 @@ resolve_list_file()
    rm -f "$_resolved_new.tmp"
    # Accumulate resolve history (DNS round-robin) — only for lists with domains
-    if grep -v '^#' "$_f" | grep -q '[a-zA-Z]' ; then
+    if grep -v '^#' "$_f" | grep -q '[g-zG-Z]' ; then
        local history_dir="$STATE_DIR/$_state/resolve_history"
        mkdir -p "$history_dir"
        rm -f "$history_dir/$HISTORY_SIZE"
@@ -571,7 +571,7 @@ resolve_list_file()
    fi
    # Detect volatile domains (IPv4 and IPv6)
-    if grep -v '^#' "$_f" | grep -q '[a-zA-Z]' ; then
+    if grep -v '^#' "$_f" | grep -q '[g-zG-Z]' ; then
        local _vname=$(echo "$_tag" | tr -d '[]')
        local _rtype="A"
        [ "$_ipcmd" = "ip -6" ] && _rtype="AAAA"