Fix the h2 request multiplexing for list of nodes

Hyper splits the "o-node: n1,n2" header because of the comma.

Use HeaderMap client-side to be more explicit about this happening.
And server-side to rebuild the original selector.

The issue was detected on a "om <path> clear".

lib/comm.py

@@ -20,6 +20,7 @@ class DummyException(Exception):
     import ssl
     import h2.connection
     import hyper
+    from hyper.common.headers import HTTPHeaderMap
     SSLWantReadError = ssl.SSLWantReadError
     SSLError = ssl.SSLError
     has_ssl = True
@@ -705,7 +706,7 @@ def h2_daemon_get(self, data, server=None, node=None, with_result=True, silent=F
         path = self.h2_path_from_data(data)
         headers = self.h2_headers(node=node, secret=secret, af=sp.af)
         body = self.h2_body_from_data(data)
-        headers["Content-Length"] = str(len(body))
+        headers.update({"Content-Length": str(len(body))})
         conn = self.h2c(sp=sp)
         method = "GET"
         try:
@@ -816,11 +817,15 @@ def h2_path_from_data(data):
         return "/"+data.get("action", "")
 
     def h2_headers(self, node=None, secret=None, af=None):
-        headers = {}
+        headers = HTTPHeaderMap()
         if node:
-            headers[Headers.node] = node
+            if isinstance(node, (tuple, list, set)):
+                for n in node:
+                    headers.update({Headers.node: n})
+            else:
+                headers.update({Headers.node: node})
         if secret and af != socket.AF_UNIX:
-            headers[Headers.secret] = secret
+            headers.update({Headers.secret: secret})
         return headers
 
     @staticmethod
@@ -862,7 +867,7 @@ def h2_daemon_stream_conn(self, data, server=None, node=None, cluster_name=None,
         path = self.h2_path_from_data(data)
         headers = self.h2_headers(node=node, secret=secret, af=sp.af)
         body = self.h2_body_from_data(data)
-        headers["Content-Length"] = str(len(body))
+        headers.update({"Content-Length": str(len(body))})
         conn = self.h2c(sp=sp, enable_push=True)
         stream_id = conn.request("GET", path, headers=headers, body=body) 
         #data = resp.read()

lib/osvcd_mon.py

@@ -2550,6 +2550,18 @@ def get_agg_aborted(self, path):
                 return False
         return True
 
+    def get_agg_conf(self, path):
+        data = Storage()
+        for inst in self.get_service_instances(path).values():
+            scale = inst.get("scale")
+            if scale is not None:
+                data.scale = scale
+            scaler_slave = inst.get("scaler_slave")
+            if scaler_slave:
+                data.scaler_slave = True
+            break
+        return data
+
     def get_agg_deleted(self, path):
         if len([True for inst in self.get_service_instances(path).values() if "updated" in inst]) > 0:
             return False
@@ -3414,7 +3426,7 @@ def instance_unprovisioned(self, instance):
         return not instance.get("provisioned", False)
 
     def get_agg(self, path):
-        data = Storage()
+        data = self.get_agg_conf(path)
         data.avail = self.get_agg_avail(path)
         data.frozen = self.get_agg_frozen(path)
         data.overall = self.get_agg_overall(path)