Support closing the connection in another process with base mode

[matyhtf]

No description provided.

[codecov]

Codecov Report

Merging #3916 (9557902) into master (f2238a7) will decrease coverage by 0.14%.
The diff coverage is 16.12%.

@@            Coverage Diff             @@
##           master    #3916      +/-   ##
==========================================
- Coverage   48.98%   48.83%   -0.15%     
==========================================
  Files          69       69              
  Lines       12849    12873      +24     
==========================================
- Hits         6294     6287       -7     
- Misses       6555     6586      +31     

Impacted Files	Coverage Δ
src/network/socket.cc	59.69% <0.00%> (-0.54%)	⬇️
src/server/base.cc	54.38% <0.00%> (+0.47%)	⬆️
src/server/reactor_process.cc	41.89% <0.00%> (-0.51%)	⬇️
src/server/master.cc	51.55% <27.77%> (-1.67%)	⬇️
src/os/async_thread.cc	70.38% <0.00%> (-0.43%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update f2238a7...9557902. Read the comment docs.