minor #14004 verify_peer in dsn should be 0 (fliespl)

This PR was merged into the 5.1 branch.

Discussion
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verify_peer in dsn should be 0

Setting it to false value resolves to true in php 7.4 since false is taken as string.

Commits
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a1ce602 verify_peer in dsn should be 0

Author: xabbuh

components/mailer.rst

@@ -171,7 +171,7 @@ configurable with the ``verify_peer`` option. Although it's not recommended to
 disable this verification for security reasons, it can be useful while developing
 the application or when using a self-signed certificate::
 
-    $dsn = 'smtp://user:pass@smtp.example.com?verify_peer=false'
+    $dsn = 'smtp://user:pass@smtp.example.com?verify_peer=0'
 
 .. versionadded:: 5.1