string.c: do not interpret '\\' before '\0' (CVE-2019-15846)

[exim.git] / test / scripts / 0000-Basic / 0361

# widened domains and duplication
need_ipv4
#
exim -odi -N miles@thishost.test.ex
****
exim -odi -d -N kilos@recurse.test.ex
****