[git] git2.0 默认的push模式

刚升级到git 2.1.2，在push到github时报错：

fatal: unable to access 'https://xxxx@github.com/xxxx/xx.git/': Empty reply from server

原因是git2.0开始，push默认使用"simple"模式，而貌似github对于"simple"模式还不怎么支持。将push.default改为"matching"模式就好了。

git push

warning: push.default is unset; its implicit value has changed in
Git 2.0 from 'matching' to 'simple'. To squelch this message
and maintain the traditional behavior, use:

  git config --global push.default matching

To squelch this message and adopt the new behavior now, use:

  git config --global push.default simple

When push.default is set to 'matching', git will push local branches
to the remote branches that already exist with the same name.

Since Git 2.0, Git defaults to the more conservative 'simple'
behavior, which only pushes the current branch to the corresponding
remote branch that 'git pull' uses to update the current branch.

See 'git help config' and search for 'push.default' for further information.
(the 'simple' mode was introduced in Git 1.7.11. Use the similar mode
'current' instead of 'simple' if you sometimes use older versions of Git)