Backport r1082196 from trunk:

core: AllowEncodedSlashes new option NoDecode to allow encoded slashes
in request URL path info but not decode them. 

PR: 35256, 46830
Reviewed by: jim, covener



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@1082630 13f79535-47bb-0310-9956-ffa450edef68