Appsec: use abstract namespace on linux

[cataphract]

Description

Create sockets in the abstract namespace by default (on linux). In this case there will be no file lock.

Reviewer checklist

• Test coverage seems ok.
• Appropriate labels assigned.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 12.50000% with 63 lines in your changes missing coverage. Please review.
✅ Project coverage is 61.64%. Comparing base (560e003) to head (72f5047).

Files with missing lines	Patch %	Lines
appsec/src/helper/network/acceptor.cpp	0.00%	43 Missing ⚠️
appsec/src/extension/network.c	40.90%	10 Missing and 3 partials ⚠️
appsec/src/helper/config.hpp	0.00%	7 Missing ⚠️

❌ Your patch status has failed because the patch coverage (12.50%) is below the target coverage (90.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3525      +/-   ##
==========================================
- Coverage   61.74%   61.64%   -0.11%     
==========================================
  Files         143      139       -4     
  Lines       13045    13051       +6     
  Branches     1704     1712       +8     
==========================================
- Hits         8055     8045      -10     
- Misses       4228     4241      +13     
- Partials      762      765       +3     

Files with missing lines	Coverage Δ
appsec/src/extension/configuration.h	100.00% <ø> (ø)
appsec/src/extension/helper_process.c	52.75% <ø> (ø)
appsec/src/helper/config.hpp	63.15% <0.00%> (-36.85%)	⬇️
appsec/src/extension/network.c	41.49% <40.90%> (-1.75%)	⬇️
appsec/src/helper/network/acceptor.cpp	0.00% <0.00%> (ø)

... and 6 files with indirect coverage changes

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[pr-commenter]

Benchmarks [ appsec ]

Benchmark execution time: 2025-12-24 13:03:34

Comparing candidate commit 72f5047 in PR branch glopes/appsec-abstract-ns with baseline commit 560e003 in branch master.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 12 metrics, 0 unstable metrics.

[pr-commenter]

Benchmarks [ tracer ]

Benchmark execution time: 2025-12-12 19:54:52

Comparing candidate commit 50f6207 in PR branch glopes/appsec-abstract-ns with baseline commit 14dc0a4 in branch master.

Found 1 performance improvements and 2 performance regressions! Performance is the same for 190 metrics, 1 unstable metrics.

scenario:ComposerTelemetryBench/benchTelemetryParsing

• 🟩 execution_time [-1338.261ns; -461.739ns] or [-12.056%; -4.160%]

scenario:MessagePackSerializationBench/benchMessagePackSerialization

• 🟥 execution_time [+3.460µs; +4.020µs] or [+3.409%; +3.960%]

scenario:MessagePackSerializationBench/benchMessagePackSerialization-opcache

• 🟥 execution_time [+6.107µs; +7.073µs] or [+5.855%; +6.782%]