Extend the H3C dictionary based on public manuals

Try to extend the H3C dictionary based on what is scattered on
their pages. At least most of it is found quite consistently in
the product-specific "Security Configuration Guides".

This compilation/crosschecking is based H3C documentation for
listed devices:
- H3C S12500 and S6800 Switches
- H3C WA WLAN Access Points
- H3C MSR Routers

Remarks:
Does not stick with H3C's use of of underline in attribute naming.

Conflicts:
	share/dictionary.h3c
Fix merge issue...
Do NOT just return 0 silently if we don't support the type in paircmp, that's a great way to mess up any trees which use the function
Add comparisons for SIGNED and ETHERNET types

Conflicts:
	src/lib/valuepair.c
Remove unused assignment
Fix scan warnings
reconnect can be called with an unused connection handle.  Fixes #507
Unsigned comes after "int"
Formatting and extra error messages
Fix operation of fr_strerror()

A while back a flag was added to fr_strerror() to stop the same error message being output multiple times (and leading to confusing debug output).

Unfortunately the macro for RERROR() and pals, inadvertently called fr_strerror() multiple times as ## __VA_ARGS__ was passed both to module_failure_msg() and radlog_request(), with the arguments to the macro being evaluated once per call.

The solution is to switch the logging functions to use va_list instead of the ellipses, add a helper to convert ## __VA_ARGS__ into va_list, and then use va_copy to create a copy of the arguments for the radlog_request() call.

As a side effect, it appears to of enabled printf format validation for more macros, so the next commit will be to fix all the places where that was previously unreported...
Fixup format strings
Doxygen
Missed break
Update ChangeLog
Arg no longer used
Remove extraneous #include
More unused log args
Simplify rdebug_pair_list

Conflicts:
	src/main/valuepair.c
Make MSCHAP xlat return -1 on failure
Change many debug messages to error messages (so Module-Failure-Message is set)
White space fixes
Support %{integer:} conversion for SIGNED integers and ETHERNET addresses