NFS volumes are not mounted if they have similar path

When passed to a nfs storage promise this works:

<pre>
bundle common nfsglobals
{
vars:
"volumes"
data => parsejson('
{
"hosts" :
{
"host" : "nfshost.example.com",
"volumes" :
[
"/PATH1",
"/PATH10",
]
}
}');
}
</pre>

While this doesn't work (PATHs interchanged):

<pre>
bundle common nfsglobals
{
vars:
"volumes"
data => parsejson('
{
"hosts" :
{
"host" : "nfshost.example.com",
"volumes" :
[
"/PATH10",
"/PATH1",
]
}
}');
}
</pre>

Likely due to substring (strstr()) comparison; https://github.com/cfengine/core/blob/master/cf-agent/nfs.c#L667