Rename build tag "proto1_legacy" -> "protolegacy"
to be consistent with the "protoreflect" tag.
Rename flag constant "Proto1Legacy" -> "ProtoLegacy" since
it covers more than simply proto1 legacy features.
For example, it covers alpha-features of proto3 that
were eventually removed from the final proto3 release.
Change-Id: I0f4fcbadd4b5a61c87645e2e5be11d187e59157c
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/189345
Reviewed-by: Damien Neil <dneil@google.com>
Package flags defines a set of constants to control support for certain features.
Other flags that may be added in the future may include:
PureGo: to control whether protobuf code should avoid using the unsafe
package and only use Go reflection.
PureProto: to control whether the proto package ignores the protoiface
package and only uses protobuf reflection. This is useful for testing.
Proto2ValidateUTF8: whether to validate UTF-8 in proto2 strings.
Proto3ValidateUTF8: whether to validate UTF-8 in proto3 strings.
Change-Id: Ibcb8dd8b3e977633b8a4e4a22a0617f2eebcc325
Reviewed-on: https://go-review.googlesource.com/127820
Reviewed-by: Damien Neil <dneil@google.com>
