Support config files without extension

[cpheps]

It would be nice if a config file does not need an extension. It's not uncommon for a dot file to not have an extension, but be in a metadata format.

In order to solve how to parse the file would be ideal to use viper.SetConfigType().

Example:

Reading in a config file $HOME/.config that is YAML formatted.

viper.AddConfigPath(homeDir)
viper.SetConfigType("yaml")
viper.SetConfigName(".config")

[zillani-nuovo]

Any update on this, We are waiting for this feature too!

[chrim5]

+1 !

[robertocromero]

We're waiting for this too.

[sagikazarmark]

This has been implemented in #722