v1.3 build 200701092300
[enh] Added plx_is_ipv4 function to check if input is valid IPv4
[enh] Added plx_ip2num() and plx_num2ip() functions to get IPv4 dotted and numeric represenations
[enh] Code comments modified for compatibility with phpDocumentor

v1.2 build 200612021100
[fea] Added extensions support (Hook: pluginlib.extensions)
[enh] Added function plx_rehash() that re-reads $_PLUGINLIB["functions"] and recreates global $plx_FUNCNAME variables
	Use this if you add functions in your extension or redefine existing ones...
[enh] General code cleanup and separation of pluginlib functions into include file
[enh] Added ChangesLog

v1.1 build 200611192005
[enh] Added $_PLUGINLIB["plugins_dir"] which identifies where extended plugins folder is

v1.0 - Initial release
[sup] Supports LDU v80x and Seditio v110
[fea] Engine detection - grab $_PLUGINLIB["engine"] to know if you're under 'ldu' or 'sed'
[fea] List of functions provided by the engine available in $_PLUGINLIB["functions"]
[fea] Compatibility mode - redefining most of the functions from "the other" engine (LDU<->Seditio)
[fea] Lookup of suggested function by its code
	for example, plx_func("sql_query") , or plx_func("cv")
[fea] globally defined engine functions (by code)
	for instance $plx_getextplugins is equal "sed_getextplugins" under Seditio and "ldu_getextplugins" under LDU
