[OpenSIPS-Devel] [OpenSIPS/opensips] dbb8f8: tm: add usage scope in documentation

[Razvan Crainea]

  Branch: refs/heads/1.11
  Home:   https://github.com/OpenSIPS/opensips
  Commit: dbb8f8b7240878d16c453301821c2c51419165a3
      https://github.com/OpenSIPS/opensips/commit/dbb8f8b7240878d16c453301821c2c51419165a3
  Author: Razvan Crainea <razvan at opensips.org>
  Date:   2017-01-18 (Wed, 18 Jan 2017)

  Changed paths:
    M modules/tm/README
    M modules/tm/doc/tm_admin.xml

  Log Message:
  -----------
  tm: add usage scope in documentation

Informs users about the scope where the transaction functions should
be used. Should prevent misuse cases, such as #1019 and so.

Thanks go to Ryan Bullock for reporting and documenting this.

(cherry picked from commit 202193bf8b1bf132e39ecf7dc4b7258839ac5ff4)