Mole fails its execution if ssh configuration file is not present

[davrodpin]

Affected Version

0.4.0

Current Behavior

Mole is failing with valid arguments given

$ mole -insecure -local :21112 -local :21113 -remote 192.168.33.11:80 -remote 192.168.33.11:8080 -server mole@127.0.0.1:22122 -key test-env/ssh-server/keys/key
ERRO[0000] error processing server options: error accessing 127.0.0.1: open /Users/mole/.ssh/config: no such file or directory

None of the arguments given depend on the ssh config file, so there is no need for the file to be required.

Steps to Reproduce

1. Install version 0.4.0
2. Execute the following command:

$ ls /Users/mole/.ssh/config
ls: /Users/mole/.ssh/config: No such file or directory
$ mole -version
mole 0.4.0
$ mole -insecure -local :21112 -local :21113 -remote 192.168.33.11:80 -remote 192.168.33.11:8080 -server mole@127.0.0.1:22122 -key test-env/ssh-server/keys/key
ERRO[0000] error processing server options: error accessing 127.0.0.1: open /Users/mole/.ssh/config: no such file or directory