Add JSON support based loosely on Heimdal's heimbase code.

Add base64 support based on Heimdal's libroken base64 code.

When the rules from util/k5ev/Makefile.in were moved to
util/verto/Makefile.in, the rule to make rename.h was broken on
non-gmake makes because the definition of SED wasn't carried over.
Define it now.

The upstream libverto depends on dynamic loading and in particular on
dladdr(), which is not universal.  To avoid this dependency, stub out
support for module loading (by replacing module.c) and instead
integrate the k5ev module directly into the bundled verto library.

This change removes the need to link, include, and invoke libverto
differently depending on whether we're using the bundled library; we
can always just link with -lverto and call verto_default().

bigredbutton: whitespace
ticket: 7351 (new)

We already define EV_USE_REALTIME to 0 to avoid the use of
clock_gettime() (to avoid depending on librt).  But in some build
environments libev can detect support for a monotonic clock, which
also results in using clock_gettime().  Define EV_USE_MONOTONIC to 0
as well to prevent this.

ticket: 7350 (new)
target_version: 1.10.4
tags: pullup

Use free() instead of gss_release_buffer() when freeing the locally
allocated context_token in the sample gss-server program.  Use
gssalloc_free() instead of free when freeing buffers in
t_kgss_kernel.c (where we can't use gss_release_buffer).

wshelper is clearly not intended to use unicode:
wprintf is used extensively and exclusively to write to char[] buffers and
fields in dns structs are used as explicitly ASCII text.

Signed-off-by: Alexey Melnikov <aamelnikov@gmail.com>

ticket: 7210 (new)
tags: pullup