[balsa] Reject invalid characters.

[bencebeky]

Signed-off-by: Bence Béky [email protected]

Commit Message: [balsa] Reject invalid characters. Additional Description: Protected by default-false runtime flag. Risk Level: low Testing: //test/common/http/http1:codec_impl_test Docs Changes: n/a Release Notes: n/a Platform Specific Features: n/a

[repokitteh-read-only[bot]]

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:cat:

Caused by: https://github.com/envoyproxy/envoy/pull/22629 was opened by bencebeky.

see: more, trace.

[bencebeky]

Dianna, Biren, PTAL.

/assign @diannahu @birenroy

[bencebeky]

/assign @KBaichoo

[bencebeky]

PTAL. I added some more test changes.

[bencebeky]

also is this still draft? Thanks

Oops, it's ready for review, marking it as such...

[KBaichoo]

/wait