Bound test 19's dead-address connects so it is fast on macOS

19_local-connect-fallback pins dead loopback IPs (127.0.0.2/.3) before the live
one to exercise address fallback. On Linux those refuse instantly (all of
127.0.0.0/8 is loopback); macOS has only 127.0.0.1, so the connects block to
--timeout, and default retries replay the whole crawl, so the exhaustion case
took ~2 minutes. It passed but dominated the macOS suite once the rest runs in
parallel. Drop --timeout to 5s (bounds the last candidate's stall; the earlier
ones already fall back at min(timeout,10)) and set --retries=0 (no ×3 replay).
Linux is unchanged: the refused connects never reach the timeout.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Signed-off-by: Xavier Roche <roche@httrack.com>

tests/19_local-connect-fallback.test

@@ -66,9 +66,12 @@ test -n "$port" || {
 }
 
 out="$tmpdir/crawl"
+# macOS has only 127.0.0.1, so the dead 127.0.0.x connects block to the timeout
+# instead of refusing instantly (as on Linux); a small --timeout + --retries=0
+# bound the stall without changing what the fallback exercises.
 HTTRACK_DEBUG_RESOLVE="deadhost:127.0.0.2,127.0.0.1" \
     httrack "http://deadhost:$port/simple/basic.html" -O "$out" \
-    -c1 --robots=0 --timeout=30 --quiet -Z >"$tmpdir/log" 2>&1
+    -c1 --robots=0 --timeout=5 --retries=0 --quiet -Z >"$tmpdir/log" 2>&1
 
 log="$out/hts-log.txt"
 
@@ -92,12 +95,12 @@ test -f "$out/deadhost_$port/simple/basic.html" || {
     exit 1
 }
 
-# every address refused: the slot exhausts the list, then errors out (the
-# harness timeout would catch a hang/loop; refused connects are instant)
+# every address dead: the slot exhausts the list, then errors out (the harness
+# timeout would catch a hang/loop)
 out2="$tmpdir/crawl2"
 HTTRACK_DEBUG_RESOLVE="alldead:127.0.0.2,127.0.0.3" \
     httrack "http://alldead:$port/simple/basic.html" -O "$out2" \
-    -c1 --robots=0 --timeout=30 --quiet -Z >"$tmpdir/log2" 2>&1
+    -c1 --robots=0 --timeout=5 --retries=0 --quiet -Z >"$tmpdir/log2" 2>&1
 log2="$out2/hts-log.txt"
 
 grep -q "trying next address" "$log2" || {