take a "const struct req *" so enforce this.

Fixes: #1133

into the obscure corners over there, making vmod.std a better copy&
paste example and removing things like "panic" from the VCC.

acceptor to center.

Fixes	#1147 and #1148

Fixes	#1153

if it fails.

64 backend VCL name + IPv4, IPv6 and portnumber.

Fixes	#1144

last without checking if the filename changed.

Fixes		#1145
Testcase by:	tobixen