Netbios: detect query response

[gpotter2]

• fixes https://github.com/secdev/scapy/issues/4443
• add some doc
• better NetbiosNameField

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.

Project coverage is 81.51%. Comparing base (2091f69) to head (2bb350d). Report is 2 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #4445 +/- ## ========================================== + Coverage 81.46% 81.51% +0.05% ========================================== Files 353 353 Lines 84394 84778 +384 ========================================== + Hits 68748 69107 +359 - Misses 15646 15671 +25 ``` | [Files](https://app.codecov.io/gh/secdev/scapy/pull/4445?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=secdev) | Coverage Δ | | |---|---|---| | [scapy/fields.py](https://app.codecov.io/gh/secdev/scapy/pull/4445?src=pr&el=tree&filepath=scapy%2Ffields.py&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=secdev#diff-c2NhcHkvZmllbGRzLnB5) | `92.61% <100.00%> (ø)` | | | [scapy/layers/netbios.py](https://app.codecov.io/gh/secdev/scapy/pull/4445?src=pr&el=tree&filepath=scapy%2Flayers%2Fnetbios.py&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=secdev#diff-c2NhcHkvbGF5ZXJzL25ldGJpb3MucHk=) | `92.02% <75.00%> (-0.51%)` | :arrow_down: | ... and [6 files with indirect coverage changes](https://app.codecov.io/gh/secdev/scapy/pull/4445/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=secdev)