Prevent processing if link header is not present or broken.
Prevent processing if link header is not present or broken.

yaoxiaoyong/github,davengeo/github,peter-murach/github,anabhilash619/github,firstval/github,piotrmurach/github,samphilipd/github,wicky-info/github,GistBox/github,joshsoftware/github,durai145/github,MalachiTatum/github,cocktail-io/github,befairyliu/github