Rename FromNowOneAllowType to FromNowOnAllowType.

This misspelling is confusing (is it allow one more rule, or all of
them?) and since v3 isn't released yet, use the major version bump
opportunity to rectify it.

src/actions/disruptive/allow.cc

@@ -37,7 +37,7 @@ bool Allow::init(std::string *error) {
     } else if (a == "request") {
         m_allowType = RequestAllowType;
     } else if (a == "") {
-        m_allowType = FromNowOneAllowType;
+        m_allowType = FromNowOnAllowType;
     } else {
         error->assign("Allow: if specified, the parameter " \
             "most be: phase, request");

src/actions/disruptive/allow.h

@@ -47,7 +47,7 @@ enum AllowType : int {
   /**
    *
    */
-  FromNowOneAllowType,
+  FromNowOnAllowType,
 };
 
 
@@ -71,8 +71,8 @@ class Allow : public Action {
             return "Request";
         } else if (a == PhaseAllowType) {
             return "Phase";
-        } else if (a == FromNowOneAllowType) {
-            return "FromNowOne";
+        } else if (a == FromNowOnAllowType) {
+            return "FromNowOn";
         } else {
             return "Unknown";
         }