netinfo code refactoring beginning
Refactoring ifutil and startscreen. Almost finish
startscreen : Fix wrong variables names
conf.py : define a generic set_param() function in place
of old one that just define default_nic parameter
Remove the only one ref to old conf.py method set_default_nic
Fix NetworkInfo class prototype def compliant with python 2.4
Refactore ipaddr.py and adapt call to moved methods
Adjust Class name, and clearing startscreen
Merge branch 'master' into cleaning

Conflicts:
	bootconsole/conf.py
	conf/bootconsole.conf
	startscreen
startscreen: cleaning code, fix adv_hosts method to correctly invoc set_hosts
ifutil : cleaning code, fix write_conf and keep comment in network file
Fix: make ifnames class attribute
Fix: yesno menu to keep actual net conf
Fix: conf.py set_param method now write good desc and conf
Merge branch 'master' into cleaning

Remove validated file when remove rpm from system.
Remove hosts entries when alias match in entry outside of bootconsole
block
Remove SUPrintServer from bootconsole
Fix wrong alias variable in startscreen

Conflicts:
	bootconsole/conf.py
	startscreen
Fix: typo and refactoring
Fix: wrong indent in load_conf() function in conf.py
Fix: strip " in reading conf method
Startscreen: change file to extract date of vm clone or creation
Add alias.sh to disable blkid command from shell
Change usage.txt info
Re change to usage.txt to take date composing serial number instead of blkid.tab