gsmopen: added an excerpt from gsmlib FAQ on how to sending UCS2 when characters cannot be represented in GSM-7 (gsmlib does not support utf to UCS2)

gsmopen: added gsmlib support to outbound smss (eg: PDU mode). Must implement a mechanism to fall back sending in UCS2 when characters cannot be represented in iso-8859-1 (gsmlib does not support utf)

please stop removing libs/ldns/install-sh if you can't make it actually work on all platforms.  This is the second time I have had to erevert this

FS-4125 --resolve you should really switch to {} when you know you have one dial string but i'll add this as a convienence

FS-4116 --resolve repeat bootstrap.sh or manually remove config.cache before running configure. The options was cached from the first time you ran configure and the new --without-openssl param did not matter

move relevant portion of display update code into the core and fix mod_loopback bug involving passing display updates across properly

FS-4114 --resolve this bug is actually in libsndfile, if its not fixed in the latest version we probably should report it upstream

Non-PRI_NEW_SET_API logging callbacks were only available in libpri-1.0 and older,
which also lacks PRI_IO_FUNCS (required) and wouldn't work anyway.

Explicitly check for both PRI_* feature defines at configure time and reject libpri
versions that lack them.

Remove the non-PRI_NEW_SET_API logging callbacks in ftmod_libpri.c.
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

Use the PRI_NEW_SET_API define provided by >=libpri-1.2 to distinguish
between old style and new style pri_set_error() and pri_set_message()
callback functions.

Improve message logging by using ftdm_log_chan() if per-span
data with a valid (d-)channel object is available.
NOTE: pri_get_userdata() returns NULL if pri is NULL.

This will reduce the horizontal space for libpri output a bit, but allows
us to see which span the message/error came from.
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>