Update to latest upstream 4.2

It also adds some comments in spec file to describe we should use
EXTRAVERSION against make command when we have a subversion.

Resolves: rhbz#2026723, rhbz#2026532, rhbz#1995587

Signed-off-by: Xiao Ni <xni@redhat.com>

mdadm.spec

@@ -1,7 +1,10 @@
 Name:        mdadm
 Version:     4.2
-%define subversion rc2
-Release:     rc2_1%{?dist}.2
+Release:     1%{?dist}
+# If Release is not same with subversion, please define extraversion
+# For example, release is rc3-1, subversion is rc3.
+# extraversion should be rc3-1. This is used in Readme.c
+%define extraversion 1
 Summary:     The mdadm program controls Linux md devices (software RAID arrays)
 URL:         http://www.kernel.org/pub/linux/utils/raid/mdadm/
 License:     GPLv2+
@@ -41,7 +44,8 @@ file can be used to help with some common tasks.
 %autosetup -p1 -n %{name}-%{version}%{?subversion:_%{subversion}}
 
 %build
-make %{?_smp_mflags} CXFLAGS="$RPM_OPT_FLAGS" LDFLAGS="$RPM_LD_FLAGS" SYSCONFDIR="%{_sysconfdir}" mdadm mdmon
+#If extraversion is defined, add EXTRAVERSION="%{extraversion}"
+make %{?_smp_mflags} CXFLAGS="$RPM_OPT_FLAGS" LDFLAGS="$RPM_LD_FLAGS" SYSCONFDIR="%{_sysconfdir}" EXTRAVERSION="%{extraversion}" mdadm mdmon
 
 %install
 make DESTDIR=%{buildroot} MANDIR=%{_mandir} BINDIR=%{_sbindir} SYSTEMD_DIR=%{_unitdir} UDEVDIR=/usr/lib/udev/ install install-systemd
@@ -90,6 +94,10 @@ install -m644 %{SOURCE6} %{buildroot}/etc/libreport/events.d
 /etc/libreport/events.d/*
 
 %changelog
+* Fri Dec 31 2021 Xiao Ni <xni@redhat.com> - 4.2
+- Update to upstream 4.2
+- Resolves rhbz#2026723, rhbz#2026532, rhbz#1995587
+
 * Fri Aug 13 2021 Xiao Ni <xni@redhat.com> - 4.2-rc2_1.2
 - Fix gating test error and rpminspect error
 - Resolves rhbz#1870487, rhbz#1880529

sources

@@ -1 +1 @@
-SHA512 (mdadm-4.2-rc2.tar.xz) = 09a3657284c7f98892f5be663d5e034252ff319d8ff1d235597efc373c156188d450e12f64a9a0fb9266b00035c1602133e487ce1961db1a12db05f7f9829249
+SHA512 (mdadm-4.2.tar.xz) = 57897a2b7fb8b0b88bece50501099872bb45ddb076cfc323d563588096d2b66b1ecba3724534943f651ace2bfe591482570700616500dc3398552e4f9ff0c37d