Podpora pro chybejici strankovani v SEO odkazech

Dle pozadavku zde: https://zulip.pirati.cz/#narrow/stream/34-Technick.C3.BD-odbor/topic/forum/near/3081842

phpbb-htaccess.conf

@@ -82,9 +82,9 @@
   # FORUM ALL MODES
   RewriteRule ^(forum|[a-z0-9_-]*-f)([0-9]+)/?(page([0-9]+)\.html)?$ /viewforum.php?f=$2&start=$4 [QSA,L,NC,R=302]
   # TOPIC WITH VIRTUAL FOLDER ALL MODES
-  RewriteRule ^(forum|[a-z0-9_-]*-f)([0-9]+)/(topic|[a-z0-9_-]*-t)([0-9]+)(-([0-9]+))?\.html$ /viewtopic.php?f=$2&t=$4&start=$6 [QSA,L,NC,R=302]
+  RewriteRule ^(forum|[a-z0-9_-]*-f)([0-9]+)/(topic|[a-z0-9_-]*-t)([0-9]+)(-s?([0-9]+))?\.html$ /viewtopic.php?f=$2&t=$4&start=$6 [QSA,L,NC,R=302]
   # GLOBAL ANNOUNCES WITH VIRTUAL FOLDER ALL MODES
-  RewriteRule ^announces/(topic|[a-z0-9_-]*-t)([0-9]+)(-([0-9]+))?\.html$ /viewtopic.php?t=$2&start=$4 [QSA,L,NC,R=302]
+  RewriteRule ^announces/(topic|[a-z0-9_-]*-t)([0-9]+)(-s?([0-9]+))?\.html$ /viewtopic.php?t=$2&start=$4 [QSA,L,NC,R=302]
   # PHPBB FILES ALL MODES
   RewriteRule ^resources/[a-z0-9_-]+/(thumb/)?([0-9]+)$ /download/file.php?id=$2&t=$1 [QSA,L,NC,R=302]
   # POST