* global: patch created by running:
for f in $(git ls-files '*.[ch]') ; do
    cppi $f > $f.t && mv $f.t $f
done

MinGW's ld gives an error when trying to export undefined symbols.

* src/util/network.[ch] Add functions for address->text and get/set
  port number
* src/libvirt_private.syms: add new entry points

* src/util/network.h src/util/network.c: utilities to parse network
  addresses, check netmask and compute ranges