AJP13 protocol parser

Tobias Begalke e4f4b07019 - added some bounds checks since munchclient crashed in production il y a 7 ans
ajp13.go e4f4b07019 - added some bounds checks since munchclient crashed in production il y a 7 ans
ajp13_test.go c0560ceda7 init il y a 7 ans
header.go c0560ceda7 init il y a 7 ans
method.go c0560ceda7 init il y a 7 ans