Vibhansa/proxy details (#682)

Correction proxy cli option details on when to skip that and when to use it.

README.md

@@ -70,8 +70,8 @@ For more information, see the [wiki](https://github.com/Azure/azure-storage-fuse
      * [OPTIONAL] **--max-eviction=0** : Number of files to be evicted from cache at once. Default is 0 meaning no limit. All expired files will be evicted. This value may be set to a number greater than zero to batch up cache eviction in different cycles so that 100% CPU does not get consumed by cache eviction. 
      * [OPTIONAL] **--set-content-type=false** : Flag to turn on automatic 'content-type' property based on the file extension. Default is false so content-type will only be set if the uploaded file specifies it.
      * [OPTIONAL] **--ca-cert-file=/etc/ssl/certs/proxy.pem** : If external network is only available through a proxy server, this parameter should specify the proxy pem certificate otherwise blobfuse cannot connect to the storage account. This option is only available from version 1.3.7
-     * [OPTIONAL] **--https-proxy=http://10.1.22.4:8080/** : If external network is only available through a proxy server, this parameter should specify the proxy server along with the port which is 8080 unless there are some deviations from normal port allocation numbers. This option is only available from version 1.3.7
-     * [OPTIONAL] **--http-proxy=http://10.1.22.4:8080/** : Only used when https is turned off using --use-https=false, and if external network is only available through a proxy server, this parameter should specify the proxy server along with the port which is 8080 unless there are some deviations from normal port allocation numbers. This option is only available from version 1.3.7
+     * [OPTIONAL] **--https-proxy=http://10.1.22.4:8080/** : If external network is only available through a proxy server, this parameter should specify the proxy server along with the port which is 8080 unless there are some deviations from normal port allocation numbers. This option is only available from version 1.3.7. Use this cli option only when proxy needs a certificate for authentication to go through and certificate is not available at standard linux path. For regular proxy connection defining standard environment variables for proxy (http_proxy/https_proxy) are enough.
+     * [OPTIONAL] **--http-proxy=http://10.1.22.4:8080/** : Only used when https is turned off using --use-https=false, and if external network is only available through a proxy server, this parameter should specify the proxy server along with the port which is 8080 unless there are some deviations from normal port allocation numbers. This option is only available from version 1.3.7. Use this cli option only when proxy needs a certificate for authentication to go through and certificate is not available at standard linux path. For regular proxy connection defining standard envrionment variables for proxy (http_proxy/https_proxy) are enough.
      * [OPTIONAL] **--max-retry=26** : Maximum retry count if the failure codes are retryable. Default count is 26.  This option is only available from version 1.3.8
      * [OPTIONAL] **--max-retry-interval-in-seconds=60** : Maximum number of seconds between 2 retries, retry interval is exponentially increased but it can never exceed this value. Default naximum interval is 60 seconds.  This option is only available from version 1.3.8
      * [OPTIONAL] **--basic-remount-check=false** : Set this to true if you want to check for an already mounted status using /etc/mtab instead of calling the syscall 'setmntent'. Default is false. It is known that for AKS 1.19 and a few other linux distros, blobfuse will throw a segmentation fault error on mount, so set this to true.  This option is only available from version 1.3.8