RewriteCond
RewriteRuleの前に複数書くことができる
複数のRewriteCondを書いた場合はすべての条件に適合した場合にのみRewriteRuleが発動する
https://httpd.apache.org/docs/current/mod/mod_rewrite.html#rewritecond
table:RewriteCond
Description: Defines a condition under which rewriting will take place
Syntax: RewriteCond TestString CondPattern flags
Context: server config, virtual host, directory, .htaccess
Override: FileInfo
Status: Extension
Module: mod_rewrite