Remove the underscore from "rdata_fromstring" so that all helper functions for libdns tests use a common naming covention. (cherry picked from commit2980cbd55f) (cherry picked from commit107102d333)
Remove the underscore from "rdata_fromstring" so that all helper functions for libdns tests use a common naming covention. (cherry picked from commit2980cbd55f) (cherry picked from commit107102d333)