add help query
Merge remote-tracking branch 'cnnic/dev' into local
Merge remote-tracking branch 'cnnic/dev' into local
Merge pull request #250 from forumbyr/master

fix bug: domain/ns NFKC problem
Merge pull request #251 from forumbyr/master

update redirect section
add Help
Merge pull request #252 from forumbyr/master

concurrent query count limit: can choose not limit ,by conf 0 in prop
Merge commit 'd122b31b357f547220e7c67c7f843c8abfe06c54' into local
Merge remote-tracking branch 'cnnic/dev' into local
add help
Merge pull request #254 from warmdawn/dev

add Help
Merge pull request #253 from wade1012/dev

Dev Wade
fix bug:arpa domain should not contain variants;
modify sql init.
Merge pull request #255 from forumbyr/master

fix bug:arpa domain should not contain variants;
help link to links with type 'help' instead of 'notice'
Merge pull request #256 from warmdawn/dev

help link to links with type 'help' instead of 'notice'
update requirement doc;
update sql schema;
update build file.
Merge pull request #257 from forumbyr/master

update requirement doc;
fix bug: variants query problem.
update build file