MT#7841 callforward api: hide ids

(cherry picked from commit f56f49a7e85698643dc2332bafe497d738519da2)
MT#7841 document api callforwards, cfmappings

(cherry picked from commit b0235d97d14485cfad1becc25c8df7d1f0552b16)
MT#7841 API callforwards: improve documentation examples

(cherry picked from commit 6dd156225298e1127992a95b8f2dab3557a2e99c)