Update default signature

.muttrc

@@ -11,7 +11,7 @@
 
 set realname        = "Emmanuel Bouthenot"
 set from            = "kolter@openics.org"
-set signature       = "~/.signatures/kolter_openics"
+set signature       = "~/.signatures/main"
 alternates          "kolter|emmanuel\.bouthenot|openics\.org|netconfig|bouthenot\.name"
 
 set envelope_from   = yes                         # set return-path to from instead of user@hostname