mod_allowmethods: Correct Merging of "reset" and do

not allow an empty parameter list for the
AllowMethods directive.

Furthermore switch from AP_MODULE_DECLARE_DATA
to AP_DECLARE_MODULE (the module was brought in
after the big logging refactoring).


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1151143 13f79535-47bb-0310-9956-ffa450edef68