Merge #20512: doc: Add bash as an OpenBSD dependency

1d578c0 doc: Add bash as an OpenBSD dependency (Emil Engler)

Pull request description:

  If we require Python for the test framework, we should also require
  bash. It is required for the linters and other scripts and does not
  comes in a default OpenBSD installation.

ACKs for top commit:
  practicalswift:
    ACK 1d578c0
  RiccardoMasutti:
    ACK 1d578c0
  theStack:
    ACK 1d578c0

Tree-SHA512: ef14e801983093a99d4c28d134adbc589ca06e5437bf1ff34f8e593968c59793e9d99e8a48f577f847acdfc5185e193276526894b4c632c59d66d87939977910

Author: jonasschnelli

doc/build-openbsd.md

@@ -15,6 +15,7 @@ pkg_add qt5 # (optional for enabling the GUI)
 pkg_add autoconf # (select highest version, e.g. 2.69)
 pkg_add automake # (select highest version, e.g. 1.16)
 pkg_add python # (select highest version, e.g. 3.8)
+pkg_add bash
 
 git clone https://github.com/bitcoin/bitcoin.git
 ```