*sigh* of course there are two versions of strerror_r():

	char *strerror_r() - GNU
	int strerror_r() - non-GNU

Revert and back the drawing board...

This reverts commit 3c82033e.

FS-4481 --resolve seg is fixed but just utf-8 will not work. you need type/subtype format like text/utf-8

strerror_r() returns the error message string (and expects you to use it).
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

add api-expansion to switch.conf.xml and fsctl api_expansion command to control allowing apis to be expanded via variable expansion

Fixes:
  src/ftmod/ftmod_misdn/ftmod_misdn.c: In function 'misdn_handle_mph_information_ind':
  src/ftmod/ftmod_misdn/ftmod_misdn.c:871:3: error: format '%lx' expects argument of type 'long unsigned int', but argument 13 has type 'uint64_t' [-Werror=format]
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

FS-4470 try this, the tmp_hanguphook will flag the b leg with CF_REDIRECT in the event that it hangs up which should spare it from the codepath in exchange_media state

Do a "soft" wraparound with modulo, removes the ~0.5s tone glitch.
(Multiply ts.rate (samples) by two to match the offset unit (bytes, 2 per sample).)
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

Store the offset in the teletone buffer in the b-channel private data.

An NT-mode setup with ftmod_misdn showed severe (dial-)tone distortions
in a sound editor (330Hz sine wave phase errors), caused by
using a global teletone buffer offset.

Switching to a per-channel offset, that is advanced by the amount
of data actually written to the channel, removes (almost) all
distortions.

There is still a minimal phase error every ~500ms (audible) that
needs more investigating.
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

FS-4467 try this patch that will sanity check for dups to catch this case when the ambigous method is used

Might as well import these too...

ftdm_offset_of() - Get offset of member in structure.

ftdm_container_of() - Get pointer to enclosing structure from pointer to structure member.
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

ftdm_min(x,y) - Returns the smaller of the two values x and y.

ftdm_max(x,y) - Returns the larger of the two values x and y.

ftdm_clamp(val, min, max) - Returns value that is in the range [vmin,vmax].
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

Remove the 'state' variable of per-channel data, use active flag exclusively to track
open/close state.

Add misdn_activate_channel()/misdn_deactivate_channel() helper functions, rename old
one to _misdn_toggle_channel() (internal).

Add _nowait variant of channel de-/activation function, that just sends the mISDN request message.
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

ftmod_isdn: Use span trunk_mode to select default mode and print warning if final modes do not match.

Same as ftmod_libpri.
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

Signed-off-by: Stefan Knoblich <stkn@openisdn.net>