[web] Encode metric name such that it can contain characters like '+', fixes Bz #275.
[web] Encode metric name such that it can contain characters like '+', fixes Bz #275.

Submitted-by: Urs Beyerle <urs.beyerle@env.ethz.ch>


git-svn-id: 27e0aca8c7a52a9ae65dfba2e16879604119af8c@2342 93a4e39c-3214-0410-bb16-828d8e3bcd0f

fastly/ganglia,fastly/ganglia,fastly/ganglia,fastly/ganglia,fastly/ganglia