minor #16274 Correct spelling & grammar in 4.4 http_cache/ (gnito-org)

This PR was merged into the 4.4 branch.

Discussion
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Correct spelling & grammar in 4.4 http_cache/

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Commits
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bb7bda9 Correct spelling & grammar in 4.4 http_cache/

Author: javiereguiluz

http_cache/cache_invalidation.rst

@@ -91,7 +91,7 @@ to support the ``PURGE`` HTTP method::
 
 **Purge** instructs the cache to drop a resource in *all its variants*
 (according to the ``Vary`` header, see :doc:`/http_cache/cache_vary`). An alternative to purging is
-**refreshing** a content. Refreshing means that the caching proxy is
+**refreshing** the content. Refreshing means that the caching proxy is
 instructed to discard its local cache and fetch the content again. This way,
 the new content is already available in the cache. The drawback of refreshing
 is that variants are not invalidated.

http_cache/ssi.rst

@@ -33,7 +33,7 @@ Symfony manages only the ``#include virtual`` one.
 
 .. caution::
 
-    Be careful with SSI, your website may be victim of injections.
+    Be careful with SSI, your website may fall victim to injections.
     Please read this `OWASP article`_ first!
 
 When the web server reads an SSI directive, it requests the given URI or gives

http_cache/varnish.rst

@@ -89,7 +89,7 @@ configuration of PHP, your session cookie has the name ``PHPSESSID``:
                 set req.http.Cookie = regsuball(req.http.Cookie, "^[; ]+|[; ]+$", "");
 
                 if (req.http.Cookie == "") {
-                    // If there are no more cookies, remove the header to get page cached.
+                    // If there are no more cookies, remove the header to get the page cached.
                     unset req.http.Cookie;
                 }
             }