idx2rwmap: remove legacy cases
idx2rwmap: remove legacy cases

They can be handled by RewriteRules:

    RewriteRule ^/man/0/(.*$) /$1
    RewriteRule ^/man/([0-9ln]p?m?)/(.*$) /$2.$1

    RewriteRule ^/man0/(.*$) /$1
    RewriteRule ^/man([0-9ln]p?m?)/(.*$) /$2.$1
    RewriteRule ^/([^/]+)/man0/(.*$) /$2.$1
    RewriteRule ^/([^/]+)/man([0-9ln]p?m?)/(.*$) /$3.$2.$1

    RewriteRule ^/man/([a-z]*)/([^/]+)/0/(.*$) /$1/$3.$2
    RewriteRule ^/man/([a-z]*)/([^/]+)/([0-9ln]p?m?)/(.*$) /$1/$4.$3.$2
    RewriteRule ^/man/([a-z]*)/0/(.*$) /$1/$2
    RewriteRule ^/man/([a-z]*)/([0-9ln]p?m?)/(.*$) /$1/$3.$2

    RewriteRule ^/0/(.*$) /$1
    RewriteRule ^/([0-9ln]p?m?)/(.*$) /$2.$1

    RewriteRule ^/man/([^/]+)/(.*$) /$2.$1
    RewriteRule ^/man/(.*$) /$1

stapelberg/debiman,Debian/debiman,stapelberg/debiman