Fix #8441: Allow system JNA on OpenBSD

Problem

On OpenBSD 7.8+, sbt fails with undefined symbol '__sF' because the bundled JNA native library (libjnidispatch.so) is incompatible with recent OpenBSD ABI changes.

sbt unconditionally sets jna.nosys=true which prevents users from using a system-installed JNA library as a workaround.

Solution

Only set jna.nosys=true if not already specified by the user. This allows OpenBSD users (and others with similar issues) to use -Djna.nosys=false to load JNA from the system path instead of the bundled version.

Changes

• Main.scala: Added conditional check at the start of xMain.run (before bootServerSocket triggers JNA initialization)
• Main.scala: Changed StandardMain.initialState to conditional
• Scripted.scala: Changed to conditional
• RunFromSourceMain.scala: Changed to conditional

Usage

OpenBSD 7.8+ users can now work around the issue with:

sbt -Djna.nosys=false

Contribution by Gittensor, see my contribution statistics at https://gittensor.io/miners/details?githubId=148254234