Author: Alex Rousskov <rousskov@measurement-factory.com>

Author: Alex Rousskov <rousskov@measurement-factory.com>
[request|reply]_header_* manglers fixes to handle custom headers

This patch fix the [request|reply]_header_[access|replace] configuration
parameters to support custom headers. Before this patch the user was able
to remove/replace/allow all custom headers using the "Other" as header name.

This is a Measurement Factory project.