mod_rest: Fix json-mapping stanzas with text or whitespace between tags
Test:
jsonmap.st2json( st.message({}, "hi"):indent() )
---
labels:
- 'Type-Auth'
summary: SASL OAuthBearer Mechanism
...
Introduction
============
This module adds a new SASL mechanism OAUTHBEARER, as defined in [RFC-7628](https://tools.ietf.org/html/rfc7628).
It's intended to be used together with the `mod_auth_oauthbearer.lua` module.