Merge pull request #486 from fobser/val-max-restart

Make VAL_MAX_RESTART_COUNT configurable.

diff --cc doc/unbound.conf.5.in
Simple merge

diff --cc util/config_file.c
Simple merge

diff --cc util/config_file.h
Simple merge

diff --cc util/configlexer.lex
Simple merge

diff --cc util/configparser.y
Simple merge