Optimise RewriteRules/Conds

From upstream changes on Mezzio Skeleton.

Closes shlinkio#1369.

public/.htaccess

@@ -4,14 +4,14 @@ RewriteEngine On
 RewriteCond %{REQUEST_FILENAME} -f [OR]
 RewriteCond %{REQUEST_FILENAME} -l [OR]
 RewriteCond %{REQUEST_FILENAME} -d
-RewriteRule ^.*$ - [NC,L]
+RewriteRule ^ - [NC,L]
 
 # The following rewrites all other queries to index.php. The
 # condition ensures that if you are using Apache aliases to do
 # mass virtual hosting, the base path will be prepended to
 # allow proper resolution of the index.php file; it will work
 # in non-aliased environments as well, providing a safe, one-size
 # fits all solution.
-RewriteCond %{REQUEST_URI}::$1 ^(/.+)(.+)::\2$
-RewriteRule ^(.*) - [E=BASE:%1]
-RewriteRule ^(.*)$ %{ENV:BASE}index.php [NC,L]
+RewriteCond $0::%{REQUEST_URI} ^([^:]*+(?::[^:]*+)*?)::(/.+?)\1$
+RewriteRule .+ - [E=BASE:%2]
+RewriteRule .* %{ENV:BASE}index.php [NC,L]