Improve printf statements

Improve graphic()

Update README.md

Improve _shell() with '$SHLVL

Display boot datetime in _uptime()

Use $PRETTY_NAME from /etc/os-release in _os()

Fix _uptime() units order

Redundancy for _uptime() with uptime utility

Use sh, not dc, for _uptime()

New _uptime() statusline; rm _kernal()

Use env printf

Improve _sshd() using 'user@pts/n' output from ps

Revert 015c94b "Use ps formatting to simplify..."

This reverts commit 015c94bcd508cd0fa74ed9eb6dfcd8d60a447e68.

The ps -c flag was not portable on MSYS2.

Note: BSD-style flags also don't work on MSYS2, but fall back gracefully
instead. Default MSYS2 ps lists all MSYS2 proccesses anyway.

Improve README.md

Fix README.md

Update README.md

Fix config(), improve graphic() and formatters()

Adjust status whitespace

Make colors bold, adjust formatters

Use portable 'comm', not 'cmd', in ps formatting