exit site.process sooner (#6239)
exit site.process sooner (#6239)

Merge pull request 6239
Strangehill/jekyll,ryanshaw/jekyll,getandpost/jekyll.github.io,Strangehill/jekyll,fulldecent/jekyll,ryanshaw/jekyll,x-way/jekyll,tillgrallert/jekyll,jekyll/jekyll,jaybe-jekyll/jekyll,chrisfinazzo/jekyll,yhironaka/yhironaka.github.io,x-way/jekyll,gencer/jekyll,gencer/jekyll,tillgrallert/jekyll,tillgrallert/jekyll,gencer/jekyll,ryanshaw/jekyll,fulldecent/jekyll,chrisfinazzo/jekyll,jekyll/jekyll,alex-kovac/jekyll,x-way/jekyll,ryanshaw/jekyll,getandpost/jekyll.github.io,fulldecent/jekyll,gencer/jekyll,jekyll/jekyll,alex-kovac/jekyll,getandpost/jekyll.github.io,chrisfinazzo/jekyll,alex-kovac/jekyll,fulldecent/jekyll,Strangehill/jekyll,jaybe-jekyll/jekyll,jaybe-jekyll/jekyll,tillgrallert/jekyll,chrisfinazzo/jekyll,gencer/jekyll,alex-kovac/jekyll,alex-kovac/jekyll,Strangehill/jekyll,Strangehill/jekyll,x-way/jekyll,tillgrallert/jekyll,jekyll/jekyll,jaybe-jekyll/jekyll