Fix splits everywhere to include space and tabs. Use regex split

Ticket: CM-3121
Reviewed By:
Testing Done: Ran precommit

Conflicts:
	packages/ifupdown2-addons/pkg/modulebase.py

docs/examples/interfaces_with_template

@@ -17,10 +17,8 @@ auto vlan-${v}
 iface vlan-${v} inet static
     bridge-ports glob swp1-6.${v}
     bridge-stp on
-    bridge-treeprio 32768
     bridge-ageing 200
-    bridge-maxhops 10
     bridge-maxage 10
-    bridge-fdelay 10
+    bridge-fd 10
 %endfor