Added extra certificate verification explanation.

Author: tijme

example_extensive.py

@@ -129,7 +129,7 @@ def cb_form_after_autofill(queue_item, elements, form_data):
 # Misc options
 options.misc.debug = False # If debug is enabled extra information will be logged to the console. Default is False.
 options.misc.verify_ssl_certificates = True # If verification is enabled all SSL certificates will be checked for validity. Default is True.
-options.misc.trusted_certificates = None # You can pass the path to a CA_BUNDLE file or directory with certificates of trusted CAs. Default is None.
+options.misc.trusted_certificates = None # You can pass the path to a CA_BUNDLE file (.pem) or directory with certificates of trusted CAs. Default is None.
 
 crawler = Crawler(options)
 crawler.start_with(Request("https://finnwea.com/"))