Stability & Optimize.

Conf file sanity checks.
Small Optimization in xml_update().
Code Readability Fix.

Consolidated main code line.
Now it is all together with subs below.
Optimization.

Added coherent error checking logic to the main code line.
:smile:
Optimization & Output.

Added reentrant sub ipvs_add_svc()
Changes to update_ipvs()
-Code Optimization.
-Error Logging.
Minor output change in comments()
Merge branch 'devel'