fix typo

ident

add s13/EPoller

copy s13 from s12

remove unused header

rename seq_ to sequence_

copy s12 from s11

rename TimerQueue::scheduleInLoop to TimerQueue::addTimerInLoop

support TimerQueue:cancel()

add s11/Connector s11/test12.cc

sleep before sending data in s09/test10.cc

copy s11 from s10

enable multithreading in s10

add s10/EventLoopThreadPool, update s10/TcpServer and s10/test9

no abort(), fix typo.

constness

fix typo

update reactor example for EventLoop::queueInLoop()

Add Fmt to LogStream.
Use LogStream in Logging.

add debug to Mutex

copy s10 from s09

format code to save lines.

no dup code.

format code to save lines.

add diff files.

ignore SIGPIPE.

update diff files.

add test11.cc, chargen server.

add write complete callback and tcp no delay.

copy s09 from s08

add diff files.

TcpConnection write

copy s08 from s07

add diff files.

read with Buffer.

copy s07 from s06

add diff files.

remove unnecessary qualifier.

passive disconnect & remove TcpConnection.

format code to save blank lines.

copy s06 from s05

no double underscores.

TcpServer creates TcpConnection.

format long lines.

copy s05 from s04

add Acceptor.

Keep test3.cc all the same across steps.

Add diff files.

create static library.

rename test5 to test6, add test5.cc for runInLoop() in same thread.

copy s04 from s03

set quit_ to false before looping.

EventLoop::runInLoop(), wakeup a loop with eventfd.

copy s03 from s02

update test1.cc, creating two threads.

timer queue works.

copy s02 from s01.

no removeChannel for now.

basic reactor works.

Add toy logging.

copy s01 from s00

reactor step 0