v1.16.6

* ENHANCEMENTS
 * Only request write when necessary (#18657) (#19422)
 * Disable service worker by default (#18914) (#19342)
* BUGFIXES
  * When dumping trim the standard suffices instead of a random suffix (#19440) (#19447)
  * Fix DELETE request for non-existent public key (#19443) (#19444)
  * Don't panic on ErrEmailInvalid (#19441) (#19442)
  * Add uploadpack.allowAnySHA1InWant to allow --filter=blob:none with older git clients (#19430) (#19438)
  * Warn on SSH connection for incorrect configuration (#19317) (#19437)
  * Search Issues via API, dont show 500 if filter result in empty list (#19244) (#19436)
  * When updating mirror repo intervals by API reschedule next update too (#19429) (#19433)
  * Fix nil error when some pages are rendered outside request context (#19427) (#19428)
  * Fix double blob-hunk on diff page (#19404) (#19405)
  * Don't allow merging PR's which are being conflict checked (#19357) (#19358)
  * Fix middleware function's placements (#19377) (#19378)
  * Fix invalid CSRF token bug, make sure CSRF tokens can be up-to-date (#19338)
  * Restore user autoregistration with email addresses (#19261) (#19312)
  * Move checks for pulls before merge into own function (#19271) (#19277)
  * Granular webhook events in editHook (#19251) (#19257)
  * Only send webhook events to active system webhooks and only deliver to active hooks (#19234) (#19248)
  * Use full output of git show-ref --tags to get tags for PushUpdateAddTag (#19235) (#19236)
  * Touch mirrors on even on fail to update (#19217) (#19233)
  * Hide sensitive content on admin panel progress monitor (#19218 & #19226) (#19231)
  * Fix clone url JS error for the empty repo page (#19209)
  * Bump goldmark to v1.4.11 (#19201) (#19203)
* TESTING
  * Prevent intermittent failures in RepoIndexerTest (#19225 #19229) (#19228)
* BUILD
  * Revert the minimal golang version requirement from 1.17 to 1.16 and add a warning in Makefile (#19319)
* MISC
  * Performance improvement for add team user when org has more than 1000 repositories (#19227) (#19289)
  * Check go and nodejs version by go.mod and package.json (#19197) (#19254)
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