* notify: log with context info
* region: guests: log with context info
* region: hosts: log with context info
* region: misc: remove redundant log
* region: skus: use NewInternalServerError instead of NewGeneralError
* appsrv: dispatcher: preserve text id
* appsrv: dispatcher: remove commented-out code
* cloudcommon: db_dispatcher: note errors that won't be translated
* cloudcommon: db: rbac: preserve text id
* cloudcommon: caller: preserve text id
* treewide: fix fmt string
* region: guest_actions: preserve text id
* region: guest_actions: fix fmt string
* region: usages: fix fmt string
* mcclient: hosts: remove redundant return value
* cloudcommon: fetch: preserve text id
* region: guest_template: preserve text id
* cloudcommon: db: db_dispatcher: preserve text id
* region: guest_actions: preserve text id
* httperrors: add funcs for wrap lang tag into context
* vendor: golang.org/x/text
* httperrors: error with context
* httperrors: HTTPError
* treewide: fix typo
* treewide: use en in source code
* locales: initial version
