guessing home directory when HOME environment variable is not available

[novia713]

path-util should consider lack of HOME environment variable and guessing correctly the home directory.
attach a PR at #25 using posix_getpwuid(posix_getuid())

[et304383]

Should not require a HOME environment variable at all. Why is HOME relevant to running commands against a webroot? You're not writing to /root (you better not be) or any other home dir, so why does this matter?

[arnaudom]

Hello, I am getting this error when console is run from an automated script. Can't find a solution on this:
hechoendrupal/drupal-console#3892

[fede-green]

We're getting this problem when using drush 10 on AWS instances. Could we get this merged?