This allows having separate values of TTL for Commit and Cleanup
and moving them apart in time, also clarifying their connection
to EditTime which was previously outside of the package level.
@paskal
* sort imports, add missing copyright
* regenerate engine mock
* make all image.Store interface functions public
* go mod tidy
* make image.Store.Load return []byte instead of io.ReadCloser
* separate memory_store example RPC server to multiple files by handlers groups
* replace store.Locator with SiteID where only it is used
* add EmailSubscription flag to User information
* add /user endpoint test for email subscription
* increase timeout for TestServerAuthHooks http client
* replace assert.Equal checks for slice length with require.Equal
* unify channel name across tests
* fix panic in Test_Main
* increase TestRest_CreateWithPictures timeout for HDD slowness
* increase TestService_VoteSameIPWithDuration timeout for HDD slowness
* increase go test timeout for HDD run
* increase TestRest_CreateWithPictures timeout for HDD slowness
* improve TestServer* reliability
* improve TestService_UserReplies reliability
* increase timeout for Test_Main
* improve TestRest_CreateWithPictures readability and reliability
* introduce random port to REST over SSL tests
* tinker TestRest_InfoStreamSince to have more slack before failure
* finalize test errors check unification
* simplify prepServerApp in cmd package tests
* improve TestRest_InfoStreamCancel reliability
* explicitly ignore error from test connection close
* add client with timeout to places which used default http client
* move random port creation and waiting for server in separate function for reuse
* improve TestServer tests robustness
* move all server waiting code in tests to separate functions
* change chooseRandomUnusedPort to try to listen to port before return
* fix waitForHTTPSServerStart
* move email unsubscription page outside of API and make it HTML
* make separate HTML template for SendErrorHTML
* fix error template name
* add test for SendErrorHTML, introduce MustExecute function
* fix content check in test of TestSendErrorHTML
* fix logging test to be more generic and not depend on line numbers
* add API methods for setting and deleting email
* fix service.SetStringUserDetail signature to return string
* switch table test with description to t.Run()
* remove debug logging
* clarify error handling, functions names
* add email integration test
* add information about email subscription to readme
* change email API calls method from PUT to POST
* typo fix, remove unneeded capturing of range variable
* email test draft
* fix notify mock, email notification test draft
* add MockDestination to startupT return
* fix tests
* add email retrieval for notifications sending
* fix mock for notify
* rearrange mock notify declaration
* add GET /email API handler, fix typos
* revert startupT signature change
* get rid of startupTWithDest workaround
* add rest examples for rest notification
* improve email messages formatting
* fix email send repeater location
* remove unneeded context from sendMessage
* change signatures of buildMessage functions to have same field name
* add missing authenticate call on TLS connection
* add dev user auth token to email requests
* change email verification template
* email code and tests cleanup
* replace fixed spaces with normal ones
* human-readable variables names for new comment reply notification
* rename Comment to CommentText
* add html for comment email notification
* fix comment notification html style
* fix email test
* fix notify email messages rendering
* fix comments on rest examples for email
* explicitly state email notify email template fields
* clarify email API documentation
* change email test not to check quoted-printable part of message
* Fix link color, add unsubscribe link
* fix rest examples tokens
* add UnsubscribeLink support to Email
* add unsubscribe email handler
* fix new reply notification email style
* enable golangci-lint for momeory_store example
* add race_test option to makefile
* prune lost goroutine in TestRest_Shutdown
* run race tests without cache
* fix ci pipeline
* fix typos