IP prefix binary search

This structure is an ordered array data structure that is used to store a dynamic set, where the keys are low and high IP addresses of prefix. Binary search compares low and high IP with the searched IP address and returns data associated with match prefix.

The prefix array can be used for storing any data (string, int). For example, it can be used to aggregate information from multiple blacklists. Data type is specific to each user and their source format (source file, delimiters, data format or data length,...), so user MUST define function load_networks(), which load and parse information, and data about networks from any of their source and fill 'ipps_network_list' structure.

Before using the search, call the ipps_init() function. The function creates all necessary structures for storing and accessing the data and return structure of IPv4 and IPv6 array of prefixes with data (network context).

The parameters are:

• Structure with networks array and networks counter

For searching, use the function ipps_search(). Function returns number of data associated with match prefix and return pointer to data as parameter:

• Structure of ip prefix context, ipps_context_t
• IP address union
• Void pointer to data array

For example, if blacklist contains:

192.168.1.0/24   aaa
192.168.1.0/25   bbb
192.168.1.128/25 ccc

{init()```}
* From 1.0 to 1.127 with data "aaa" and "bbb"
* From 1.128 to 1.255 with data "aaa" and "ccc":

192.168.1.0 192.168.1.255 ↓ ↓ <--—aaa-—> <-bbb-><-ccc->

and ```ip_prefix_search()``` is called with 192.168.1.100, search return number 2 and pointer to data "aaa" and "bbb".
For 192.168.1.200, return also number 2 but data are "aaa" and "ccc". For 192.1.1.1, search return 0 and pointer
to data is not fill.

For destruction of a whole structure and data there is ```ipps_destroy()``` function, parameter is pointer to
the ```ipps_context_t structure```, that has to be destroyed. Also, a list of networks is necessary to destroy with
function ```destroy_networks()``` (this function isn't a part of library and the user must define it).

Recommended control flow is:
1. ```load_networks(

1. ipps_init()
2. destroy_networks()
3. ipps_search()
4. ipps_destroy()

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Example file

``` /**