Fix bug#305: pkt_dname_tolower could read beyond end of buffer or   get into an endless loop, if 0x20 was enabled, and buffers are small   or particular broken packets are received.
Fix bug#305: pkt_dname_tolower could read beyond end of buffer or
  get into an endless loop, if 0x20 was enabled, and buffers are small
  or particular broken packets are received.


git-svn-id: 5ac9340a55e2f27e0b201b4c317755fd16d51776@2073 be551aaa-1e26-0410-a405-d3ace91eadb9

thozza/unbound,Karm/unbound,mir-ror/unbound,thozza/unbound,fastly/unbound,Karm/unbound,mir-ror/unbound,fastly/unbound,lucab/unbound,lucab/unbound,lucab/unbound,mir-ror/unbound,lucab/unbound,lucab/unbound,thozza/unbound,thozza/unbound,fastly/unbound,Karm/unbound,thozza/unbound,Karm/unbound,fastly/unbound,mir-ror/unbound