util.prosodyctl.check: Warn if both use_ipv4 and use_ipv6 are set to false Why would you do this?!

util.prosodyctl.check: Silence IP protocol mismatches when disabled If you set 'use_ipv4 = false' then you probably don't care much for the host not resolving to the IPv4 address, and same with 'use_ipv6'.

Merge 0.11->trunk

util.ip: Fix netmask for link-local address range This may have mistakenly caused link-local addresses to be considered global. May have caused mod_s2s and prosodyctl check dns to behave incorrectly on networks using link-local IPv4 addresses. By my guesstimate, these are extremely rare. Probably minimal impact beyond a bit longer to establish s2s and some possible confusion from prosodyctl check dns results. Ref RFC 3927

util.format: Escape ASCII control characters also in extra arguments

util.format: Allow newlines but ensure following lines are indented This should a) prevent injection of text that looks like legitimate log lines and b) not mangle tracebacks.

util.format: Fix missing backslash in pattern Made the pattern match a longer range than intended, but with no effect since those characters are not present in the 'control_symbols' table.

util.prosodyctl.check: Reload unbound to ensure hosts.txt is ignored If unbound was initialized prior to this then the config change here wouldn't apply, and it will again think that 127.0.1.1 has been found in DNS.

util.format: Change formatting of nil values to avoid looking like XML

core.loggingmanager: Pretty-print logged XML snippets in console This replaces an earlier method in a private extension that logged pretty-printed XML, which broke due to the escaping added in util.format