Enable to select install mode when net-install and hd-install

modified:   interface/ri_inst_cli.py
	new file:   main/begin-install
	modified:   operation/finish_install/98state_grid_custom.py
	new file:   text/get_instmode.sh
	new file:   text/select_inst_mode.py

interface/ri_inst_cli.py

@@ -16,7 +16,7 @@
 #       Ling Fen        2010-09-04              create
 #
 
-import ri_progress,re
+import ri_progress,re,os
 from ri_oper import language, Rate
 from snack import *
 def set_task(task_name):
@@ -29,14 +29,14 @@ def set_task_scale():
     ri_progress.i_percent = int(Rate.value)
 
 def set_task_over():
-    f = open('/proc/cmdline', 'r')
-    cmdline = f.readline().strip()
-    f.close()
-    #instmode = cmdline.split(' ')[0].split('=')[1]
-    for i in cmdline.split(' '):
-        if re.match('instmode=',i):
-            instmode = i.split('=')[1]
-            break
+    #f = open('/proc/cmdline', 'r')
+    #cmdline = f.readline().strip()
+    #f.close()
+    #for i in cmdline.split(' '):
+    #    if re.match('instmode=',i):
+    #        instmode = i.split('=')[1]
+    #        break
+    instmode = os.environ["instmode"]
     screen = SnackScreen()
     screen.drawRootText(0, 0, 'Rocky Security OS Install')
     screen.pushHelpLine(' ')