Fix netusage query to get proc w/o netdata too

plugins/helpers/common.py

@@ -50,7 +50,9 @@ def ReadMacAbsoluteTime(mac_abs_time): # Mac Absolute time is time epoch beginni
             try:
                 if isinstance(mac_abs_time, str):
                     mac_abs_time = float(mac_abs_time)
-                if mac_abs_time > 0xFFFFFFFF: # more than 32 bits, this should be nano-second resolution timestamp (seen only in HighSierra)
+                if mac_abs_time in (-63114076800, -63114076800000000000) : # MS & Python considers -63113904000 as 01-01-0001, Apple considers -63114076800
+                    return datetime.datetime(1,1,1)
+                if abs(mac_abs_time) > 0xFFFFFFFF: # more than 32 bits, this should be nano-second resolution timestamp (seen only in HighSierra)
                     return datetime.datetime(2001, 1, 1) + datetime.timedelta(seconds=mac_abs_time/1000000000.)
                 return datetime.datetime(2001, 1, 1) + datetime.timedelta(seconds=mac_abs_time)
             except (ValueError, OverflowError, TypeError) as ex:

plugins/netusage.py

@@ -97,7 +97,7 @@ def ReadNetUsageDb(db, netusage_items, source):
                 "p.ztimestamp as last_seen_date, "\
                 " lu.ztimestamp as usage_since, "\
                 "lu.zwifiin, lu.zwifiout,lu.zwiredin,lu.zwiredout,lu.zwwanin,lu.zwwanout  "\
-                "FROM zliveusage lu LEFT JOIN zprocess p ON p.z_pk = lu.zhasprocess  "\
+                "FROM zprocess p LEFT JOIN zliveusage lu ON p.z_pk = lu.zhasprocess  "\
                 "LEFT JOIN z_primarykey pk ON p.z_ent = pk.z_ent  "\
                 "ORDER BY process_name"
         db.row_factory = sqlite3.Row