user pass timestamp precision for line protocol, openTSDB related
timestamp accpet only 10 digits(second) or 13 digits(millisecond) by
default

[TD-10532]<enhance>: schemaless default numeric type changed to double, unless specified with i/u appendix for signed/unsigned integer

[TD-10445]<enhance>: convert JSON timestamp use strtoll instead strtod in cJSON lib to prevent inaccurate presicion issue

length(<=64) boundaries.

to defaultJSONType, as this param will also be used to set JSON tags
default string types.

JSON numbers.
Interger number -> BIGINT (contains only digits and '+' '-')
Floating number -> DOUBLE (including decimal point format or scientific
notation format)

telnet lines.
Interger number -> BIGINT (contains only digits and '+' '-')
Floating number -> DOUBLE (including decimal point format or scientific
notation format)

to binary/nchar through smlDefaultJSONStrType param