Linux, Solaris, and FreeBSD driver 430.26 [long-lived branch release]

Release highlights since 430.14:

    * Added support for the following GPUs: * Quadro P520 * Quadro RTX 3000 * Quadro T1000 * Quadro T2000
    • Fixed a bug, introduced in 415.13, that caused audio over DisplayPort to
      not work in some configurations.

[README | Linux x86_64 | Solaris | FreeBSD x86_64]