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- add two configurations with their respective fmtp config string

fix publish request, whose request uri must identify the resources for which the event is to be published.

Add the linphone_core_new_with_config() function to instantiate a LinphoneCore given an already existing LpConfig.

This enables the creation of the LpConfig before creating the LinphoneCore.
It is useful on some systems to read some configuration parameters and perform some customization before creating the LinphoneCore.

The LpConfig can now also be created given a factory config filename using the new lp_config_new_with_factory() function.

restore logs

- Deprecate linphone_core_enable_logs(),
  linphone_core_enable_logs_with_cb() and linphone_core_disable_logs() functions.
- Introduce linphone_core_set_log_handler(), linphone_core_set_log_file() and linphone_core_set_log_level() functions.

add accessors to late and loss rate in LinphoneCallStats.

chnage time for time change

This is making a lot of problems with video packets especially.

This reverts commit 71f31347.

Conflicts:
	coreapi/linphonecall.c
	mediastreamer2

It may lead to some crashes if a check list exists for a non-active stream.

This macro was supposed to be passed a string literal as first argument but was used with a string pointer sometimes.