util.dataforms: Encode size attributes as integers in XEP-0221 media element Otherwise very large fields would be serialized in e notation

util.dataforms: Ensure larger integers are serialized as such Assumes that most number fields are integers, as most numeric types listed in XEP-0122 are, as are all such fields in Prosody as of this. Otherwise %g produces something like 1.1259e+15

util.dataforms: Scope integer handling tests So they're separate from the datetime tests, and any future validation tests

util.dataforms: Turn number values into timestamps for datetime fields Makes it symmetric with parsing.

util.dataforms: Coerce number values for boolean fields Makes more sense than coercing to a string, which would always be truthy.

mod_muc_mam: Use util.dataforms timestamp validation

mod_mam: Use util.dataforms timestamp validation

util.dataforms: Add support for datetime field types via XEP-0122

mod_http_file_share: Move number coercion into util.dataforms

mod_admin_adhoc: Move number coercion into util.dataforms Internal use of XEP-0122 to shift the responsibility for converting numbers to strings.