[Type] An unsigned integer [Description] Indicates that the document is willing to use content that has exceeded its expiration time (cf. 'max-stale' in HTTP 1.1 [RFC2616]). If maxstale is assigned a value, then the document is willing to accept content that has exceeded its expiration time by no more than the specified number of seconds. [Required] No [Default Value] None [Name] 
maxstale
m o d e
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