fixed issue with multiline output from systemd

fixes #3868

system/service.py

@@ -514,6 +514,7 @@ class LinuxService(Service):
         value_buffer = []
         status_dict = {}
         for line in out.splitlines():
+            if '=' in line:
                 if not key:
                     key, value = line.split('=', 1)
                     # systemd fields that are shell commands can be multi-line
@@ -535,6 +536,8 @@ class LinuxService(Service):
                         key = None
                     else:
                         value_buffer.append(value)
+            else:
+                value_buffer.append(value)
 
         return status_dict