RFR: JDK-8058631 Rename posix to unix in build system to match file name changes

[Magnus Ihse Bursie]

After Jigsaw M1, there is a new common "unix" directory structure. We
have used "posix" in the build system for the same purpose, but this
leads to unnecessary conversations. Instead, we should use "unix" all
way through in the build system.

Also, this means that OS_API is slightly misleading -- we're not
actually checking for an API such as POSIX, but the general category of
OSes. I'll rename the *_OS_API to *_OS_TYPE instead. The "winapi" OS_API
was never used, and is removed -- we only need to check for "windows",
there's no need to introduce an abstract "winapi" category.

Bug: https://bugs.openjdk.java.net/browse/JDK-8058631
WebRev:
http://cr.openjdk.java.net/~ihse/JDK-8058631-rename-posix-to-unix/webrev.01

/Magnus

[Martin Buchholz]

Philosophically, there's more variation among unices than windows, but
windows OSes certainly have some variation over time. Especially if you
count the Win98 family, thankfully no longer supported.

On Wed, Sep 24, 2014 at 5:39 AM, Magnus Ihse Bursie <

Also, this means that OS_API is slightly misleading -- we're not actually
checking for an API such as POSIX, but the general category of OSes. I'll
rename the *_OS_API to *_OS_TYPE instead. The "winapi" OS_API was never
used, and is removed -- we only need to check for "windows", there's no
need to introduce an abstract "winapi" category.