apache - apache2 RewriteRule target single question mark -


could explain single ? placed @ target of rewriterule in apache2 means?

syntax: rewriterule pattern target [flag1,flag2,flag3]  rewriterule ^       ?      [end,e=error-notes:blacklisted-user-agent] or rewriterule .*      ?      [f,l]

and where's error-notes environment variable used?

what know far:

it drops query string, example /posts?page=5 become /posts?.

not sure error-notes.


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