OTA

* Added support of banning IPs
* Now many default settings can be customized such as TCP Fastopen Option
* Now config file is renamed so only a `git pull` can update the client
* Re-organized codes, removed some unused codes
* Now support multi-method client (need the support of ss-panel or some other frontend panel)
* Some modification of the log output

support ss-panel V3 mu api

Custom method switch

add custom method switch

as same as GO version

This reverts commit 3deec82.

MUAPI:use new method to update user traffic

从use new method to update user traffic开始
user.id可以不等于port了

update log

delete duplicate code

…py-mu into manyuser

---------
* Updated the description of example config
* Updated logging
* Fixed some potential errors in the relays

The error will cause the application always use pre-configured version instead of `git describe`, where applicable.

* Rebooting the server is now not required to reset the OTA activation state of a user

* Now the client IP can be shown properly in logs when UDP connection established

This reverts commit 8c6ffe2.

# Conflicts:
#	shadowsocks/udprelay.py

…errors

# A previous fix is reverted before

This reverts commit 18e1c9b.

* There are two failed fixes reverted before
* This time the problem is really fixed Σ( ° △ °|||)#

* Changed logging level of the warning in eventloop.py
* Added --tag after git describe command so that the latest tag can be shown
* Fixed a typo erro in servers.py

* Trusted user is added
* Now you can choose either whitelist mode or blacklist mode, or just shutdown the firewall function
* Modified a little bit in dbtransfer.py

* Now you can choose either to use MySQL or API, MySQL is not compousory
* config_example.py has a great change. Sections of settings are now logically arranged
* fixed some bugs

Firewall and API updates

* Now a deleted user will be removed when doing db_push
* Modified the return values of pull_api_user
* Modified some descriptions of config
* Some bug fixes

Some improvements

Bug Fixes and Performance Improvements

This reverts commit c9589bb.

* Fixed OTA bug
* Improved logging
* Added exception callback for manager thread to log unhandled exception

# Conflicts:
#	shadowsocks/tcprelay.py

* Add chacha20-ietf crypto

* fix chacha20-ietf

* PEP8

* Update sodium.py (#1)

pep8

Typo fix: password to passwd

…py-mu into manyuser

* make tcprelay.py less nested

* import traceback module at the top

* make loops in DNSResolver less nested

* make manager.py less nested

* introduce exception_handle decorator

make try/except block more clean

* apply exception_handle decorator to tcprelay

* quote condition judgement

* pep8 fix

* fix a OTA bug

* correct a wrong comment

* fix a OTA bug

* correct a wrong comment

* ignore emacs autosave files

* keep consistence with the defensive style

* a little refractor

* fix daemon stop failed (#675)

* fix test failed

* * new upstream version
* change repository.
* change license.
* standards version change to 3.9.8
* fix #810688: man page references texinfo documents which don't exist

* * merge back thomas's change

* * Fix compatible issue (Closes: #845016)

Add missing links.