Fixes for useradd-staticids.bbclass

The main change here is to fix the regression reported in
https://bugzilla.yoctoproject.org/show_bug.cgi?id=9777 which resulted in setting USERADD_ERROR_DYNAMIC having no effect if the user or group was not listed at all in a passwd or groups file.

In the ticket discussion there was also a suggestion to allow the error to be turned into a warning. I have implemented this as well, whereby one can now set USERADD_ERROR_DYNAMIC to either "error" or "warn" to decide which behavior one wants. (It is of course still possible to set it to "1" for backwards compatibility.)

The change to USERADD_ERROR_DYNAMIC requires some updates to the documentation, which is provided in the final commit. This is intended for the yocto-docs repository.

PATCHv2: Added a first commit to update the documentation of USERADD_ERROR_DYNAMIC and USERADDEXTENSION per Mark Hatle's suggestion. This is also intended for the yocto-docs repository.

//Peter

The following changes since commit 4799e1e89fd9b0f8b606e3c502fe89f32d45fe76:

  gtk+3: Add patch for --disable-opengl (2016-06-17 11:17:21 +0100)

are available in the git repository at:

git://git.yoctoproject.org/poky-contrib pkj/useradd-staticids-regression
http://git.yoctoproject.org/cgit.cgi/poky-contrib/log/?h=pkj/useradd-staticids-regression

Peter Kjellerstedt (5):
Update the documentation of USERADD_ERROR_DYNAMIC and USERADDEXTENSION documentation.conf: Add information about USERADD variables useradd-staticids.bbclass: Restore failure on missing UIDs/GIDs useradd-staticids.bbclass: Allow missing UIDs/GIDs to generate
warnings
Update the documentation of USERADD_ERROR_DYNAMIC

 documentation/ref-manual/ref-variables.xml | 27 +++++++++++++++------------
 meta/classes/useradd-staticids.bbclass     | 22 ++++++++++++++++------
 meta/conf/documentation.conf               |  4 ++++
 3 files changed, 35 insertions(+), 18 deletions(-)

2.9.0