Preventing newlines in config mode

Newlines in the config part lead to munin errors like:
"No .label provided.
This field has the following extra information: NOTE: The plugin did not provide any label for the data source requests. It is in need of fixing."
Bugfix for multiple apps

When displaying multiple apps, a bogus "uwsgi_.requests" data label was generated which lead to "No .label provided" errors.
Merge pull request #2 from j0nes2k/patch-2

Workaround for "No .label provided" bug