Update verto sources to 0.2.2 release versions.  verto_reinitialize()
now has a return value; check it in kdc/main.c.  Store verto-libev.c
alongside verto-k5ev.c to make it easy to diff corresponding versions
when updating.

https://github.com/krb5/krb5/commit/544e781832f19d9430d85d8e3097a0fadb768eff
Commit By: ghudson
Revision: 25474
Changed Files:
U   trunk/src/kdc/main.c
U   trunk/src/util/k5ev/libverto-k5ev.exports
U   trunk/src/util/k5ev/verto-k5ev.c
A   trunk/src/util/k5ev/verto-libev.c
U   trunk/src/util/verto/Makefile.in
U   trunk/src/util/verto/libverto.exports
A   trunk/src/util/verto/module.c
A   trunk/src/util/verto/module.h
U   trunk/src/util/verto/verto-module.h
U   trunk/src/util/verto/verto.c
U   trunk/src/util/verto/verto.h