(bitpacket FCGI_Record
 (version 8)
 (type 8)
 (requestIdB1 8)
 (requestIdB0 8)
 (contentLengthB1 8)
 (contentLengthB0 8)
 (paddingLength 8)
 (reserved 8)
 (contentData contentLength bitstring)
 (paddingData paddingLength bitstring))