Add missing text editor local variable blocks
Handle a failure of strerror_r

This fixes the build on gcc-4.7.3.  The build was breaking with:

  error: ignoring return value of 'strerror_r', declared with attribute warn_unused_result [-Werror=unused-result]
debian: wheezy is the new stable

And jessie is the new testing.

The king is dead, long live the king!
Don't setup ZRTP without a session and channel

FS-5472 --resolve
Fix memory corruption in mod_erlang_event

Thanks-to: Alexandre Snarskii <snar@snar.spb.ru>

FS-5465 --resolve