support multiple methods annotations and a single path mapped to multiple functions

increase performance, fix call for fallback congfig

by using a less strict, but much faster method to test if a module is 
prepared with RESTXQ annotations, we increase the performance by factor 
3. we call inspect:inspect-module#1 only for modules, that contains 
"%rest:"

add a parameter to trigger re-registration of REST functions

fix changelog xml

add header and cookie parameter
refine tests
keep a changelog