large-dns-response.patch

This will increase the accepted size for DNS responses in qmail from
512 to 65536 bytes, following a suggestion from
http://www.lifewithqmail.org/lwq.html#patches to work around large
responses, which can be common nowadays.
Patch was done against netqmail-1.06.
Alex H., 2016

--- dns.c.orig	2016-06-13 09:42:50.502001080 +0200
+++ dns.c	2016-06-13 09:44:02.233003195 +0200
@@ -19,7 +19,7 @@
 static unsigned short getshort(c) unsigned char *c;
 { unsigned short u; u = c[0]; return (u << 8) + c[1]; }
 
-static union { HEADER hdr; unsigned char buf[PACKETSZ]; } response;
+static union { HEADER hdr; unsigned char buf[65536]; } response;
 static int responselen;
 static unsigned char *responseend;
 static unsigned char *responsepos;