IFS causes some notifications to fail.

[filviu]

Hi,

Thanks for this, I just set it up! One issue I've hit is that the '%' IFS is causing issues with e.g. disk space/memory notifications:

CRITICAL - 5% (100000 kB) free

I simply changed it to something my nagios doesn't use like ^

The error was:

curl: (3) unmatched close brace/bracket in URL position 134:
 (100000 kB) free!\nTue Nov 10 16:15:04 UTC 2020```",
    "thread": {
        "name": "spaces/xxxx/threads/xxxx"
    }
}