changing data base from console regression

[catmando]

This commit 28ef6e6#diff-e50e457d8517d82c3828c357d305a74e seems to have caused a regression.

revert back to simple on_server? returning !Rails.const_defined?('Console')

In debugging this it seem there is some old unreachable code in connection#needs_initialization.

[janbiedermann]

reverting will probably lead to a performance regression for Puma

[janbiedermann]

i suggest the following:
@on_server ||= (ARGV & %w[c console]).size == 0

[catmando]

i think I got it...