设置了 hosts， dig raw.githubusercontent.com 总是失败

总是指向本地，导致 brew 安装 openresty 总是失败：

==> Installing openresty from openresty/brew
==> Downloading https://raw.githubusercontent.com/openresty/openresty/master/patches/openssl-1.1.1f-sess_set_get_cb_yield.patch
##O#- #
curl: (35) LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to raw.githubusercontent.com:443
Error: Failed to download resource "openresty-openssl111--patch"
Download failed: https://raw.githubusercontent.com/openresty/openresty/master/patches/openssl-1.1.1f-sess_set_get_cb_yield.patch

➜  ~ dig raw.githubusercontent.com

; <<>> DiG 9.10.6 <<>> raw.githubusercontent.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 32099
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;raw.githubusercontent.com.	IN	A

;; ANSWER SECTION:
raw.githubusercontent.com. 30	IN	A	0.0.0.0

;; Query time: 10 msec
;; SERVER: 192.168.2.1#53(192.168.2.1)
;; WHEN: Fri Nov 20 14:59:20 CST 2020
;; MSG SIZE  rcvd: 70

# GitHub520 Host Start
185.199.108.154               github.githubassets.com
199.232.96.133                camo.githubusercontent.com
199.232.96.133                github.map.fastly.net
199.232.69.194                github.global.ssl.fastly.net
140.82.114.3                  gist.github.com
185.199.108.153               github.io
140.82.114.4                  github.com
140.82.113.5                  api.github.com
199.232.96.133                raw.githubusercontent.com
199.232.96.133                user-images.githubusercontent.com
40.75.87.113                  favicons.githubusercontent.com
199.232.96.133                avatars5.githubusercontent.com
199.232.96.133                avatars4.githubusercontent.com
199.232.96.133                avatars3.githubusercontent.com
199.232.96.133                avatars2.githubusercontent.com
199.232.96.133                avatars1.githubusercontent.com
199.232.96.133                avatars0.githubusercontent.com
140.82.113.9                  codeload.github.com
52.216.128.147                github-cloud.s3.amazonaws.com
52.216.0.224                  github-com.s3.amazonaws.com
52.216.107.188                github-production-release-asset-2e65be.s3.amazonaws.com
52.217.1.4                    github-production-user-asset-6210df.s3.amazonaws.com
52.217.67.196                 github-production-repository-file-5c1aeb.s3.amazonaws.com
# Star me GitHub url: https://github.com/521xueweihan/GitHub520
# GitHub520 Host End