• Fix old process didn't exist when graceful restart in beego 1.12.0 #4005
  
• Enhance: Print stack while orm abnormally exit #3743
  
• Enhance: Replacing lock with read lock in GetMapData #3803
  
• Fix: Get the real location of the log directory if the path is symbolic path #3818
  
• Fix: Cache, context, session: add lock to fix inconsistent field protection #3922
  
• Fix: Encoded url(with slash) router mismatch problem #3943
  
• Fix: genRouterCode method generate wrong codes #3981
  
• Enhance: Using LRU algorithm, ignoring big file and using max cache size to reduce the memory usage of file cache #3984
  
• Fix: Set max DB connections #3985
  
• Fix: SQLite don't support SELECT ... FOR UPDATE #3992
  
• Enhance: Add Transfer-Encoding header in httplib's PostFile method #3993
  
• Enhance: Support bit operation in ORM #3994
  
• Fix: net/http Middleware set via RunWithMiddleware or App.Run(middleware) doesn't work when "BConfig.Listen.Graceful" is set to true #3995
  
• Fix: Empty field in validator.Error when label struct tag is not declared #4001
  
• Fix: panic: send on closed channel after closing logger #4004
  
• Enhance: Store RouterPattern before filter execute #4007
  
• Fix: Using HTMLEscapeString in adminui.go to avoid XSS attack #4018
  
• Fix: Process not closed when graceful set to true #4005
  
• Enhance: Use scan instead of keys in redis #4016
  
• Feature: Support prometheus #4021
  
• Fix: Can't create more than max_prepared_stmt_count statements #4025
  
• Enhance: Support more mobile number pattern #4027
  
• Fix: Can't set section name #4027
  
• Fix: strings.Repeat panic in orm/db.go #4032
  
• Enhance: Make redis client idle timeout configurable #4033