tools: Add a network test script.

[Kai Blin]

This script will tell users if their /etc/hosts file is set up correctly
and suggests a better config if needed.

This should speed up processing of about 90% of the networking bugs that
get closed as "invalid", as well as help with support.
---
 tools/wine-network-test |   63 
+++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 63 insertions(+), 0 deletions(-)
 create mode 100755 tools/wine-network-test
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