Code restructuring for Kamailio 1.5.0

The efforts to consolidate the core of Kamailio (OpenSER) and reduce duplicates of code are going on. Several modules with related functionalities were merged in others for a better and easier maintenance.
No functionality was removed, it can be now just found
in a different place.

1. gflags module
The functionality of this module was integrated into the cfgutils module. The internal functionality, function names and MI commands are the same, the parameter “initial” was renamed to “initial_gflags”.

2. options module
The functionality of this module was integrated into the siputils module. The function name was not changed, all parameters were prefixed with the "options_” string.

3. uri module
The functionality of this module was integrated into the siputils module. The function names were not changed, internal functionality is the same.

So starting from the release 1.5 you'll need to fix your "loadmodule" statements and some parameter prefixes in your config if you use one of the mentioned modules. Documentation for the functions can be found in the usual place:

[1] http://www.kamailio.org/docs/modules/devel/cfgutils.html
[2] http://www.kamailio.org/docs/modules/devel/siputils.html