For the moment, remove Limit Login Attempts if its xmlrpc for Jetpack.If Limit Login Attempts is installed as a mu-plugin, it can occasionally generate false-positives.
add_option_jetpack_network_name
add_option_jetpack_network_name-
action -
action add_option_jetpack_is_multi_siteFires when the site URL is updated.Determines if the site is part of a multisite network.
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action add_option_jetpack_is_main_networkFires when the site URL is updated.Determines if the is part of a multi network.
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action add_option_jetpack_main_network_siteFires when the site URL is updated.Determines if the site is the main site of a Mulitiste network.
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action jetpack_sync_all_registered_optionsFires when synchronizing all registered options and constants.
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action updating_jetpack_versionFires on update, before bumping version numbers up to a new version.
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filter jetpack_sync_post_module_custom_dataAllow modules to send extra info on the sync post process.
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filter get_attachmentFilters the Post Thumbnail information returned for a specific post.
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filter jetpack_photon_add_query_string_to_domainAdd query strings to Photon URL. By default, Photon doesn’t support query strings so we ignore them. This setting is Photon Server dependent.
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filter jetpack_photon_any_extension_for_domainAllow Photon to use query strings as well. By default, Photon doesn’t support query strings so we ignore them and look only at the path. This setting is Photon Server dependent.
Jetpack Developer Resources 