Add --installcert example for apache.

说明.md

@@ -119,10 +119,20 @@ acme.sh  --issue   -d  mydomain2.com   --dns  dns_dp
 
 正确的使用方法是使用 `--installcert` 命令,并指定目标位置, 然后证书文件会被copy到相应的位置,
 例如:
+## Apache example:
 ```
-acme.sh  --installcert  -d  <domain>.com   \
-        --key-file   /etc/nginx/ssl/<domain>.key \
-        --fullchain-file /etc/nginx/ssl/fullchain.cer \
+acme.sh --installcert -d example.com \
+--cert-file      /path/to/certfile/in/apache/cert.pem  \
+--key-file       /path/to/keyfile/in/apache/key.pem  \
+--fullchain-file /path/to/fullchain/certfile/apache/fullchain.pem \
+--reloadcmd     "service apache2 force-reload"
+```
+
+## Nginx example:
+```
+acme.sh --installcert -d example.com \
+--key-file       /path/to/keyfile/in/nginx/key.pem  \
+--fullchain-file /path/to/fullchain/nginx/cert.pem \
 --reloadcmd     "service nginx force-reload"
 ```