Clean up build requires lines

Drop podlators since QEMU no longer uses POD for man pages.

Drop all version numbers, since we can assume Fedora has new enough
packages.

Make comments a little more consistent.

Drop rados2-devel  as it is implied by rbd-devel

Use rbd-devel instead of rbd1-devel due to rename

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

qemu.spec

@@ -232,13 +232,11 @@ Source21: 95-kvm-ppc64-memlock.conf
 BuildRequires: gcc
 # documentation deps
 BuildRequires: texinfo
-# For /usr/bin/pod2man
-BuildRequires: perl-podlators
 %if %{qemu_sanity_check}
 BuildRequires: qemu-sanity-check-nodeps
 BuildRequires: kernel
 %endif
-# For chrpath calls in specfile
+# chrpath calls in specfile
 BuildRequires: chrpath
 
 # -display sdl support
@@ -266,47 +264,45 @@ BuildRequires: libnfs-devel
 BuildRequires: snappy-devel
 # lzo compression for memory dump
 BuildRequires: lzo-devel
-# needed for -display curses
+# curses display backend
 BuildRequires: ncurses-devel
-# used by 9pfs
+# 9pfs filesystem
 BuildRequires: libattr-devel
-# used by qemu-bridge-helper and qemu-pr-helper
+# qemu-bridge-helper, qemu-pr-helper and more
 BuildRequires: libcap-ng-devel
 # spice usb redirection support
-BuildRequires: usbredir-devel >= 0.5.2
+BuildRequires: usbredir-devel
 %if %{have_spice}
 # spice graphics support
-BuildRequires: spice-protocol >= 0.12.2
+BuildRequires: spice-protocol
-BuildRequires: spice-server-devel >= 0.12.0
+BuildRequires: spice-server-devel
 %endif
 # seccomp containment support
-BuildRequires: libseccomp-devel >= 2.3.0
+BuildRequires: libseccomp-devel
-# For network block driver
+# network block driver
 BuildRequires: libcurl-devel
 %if %{with_block_rbd}
-# For rbd block driver
+# RBD block driver
-BuildRequires: librados2-devel
+BuildRequires: librbd-devel
-BuildRequires: librbd1-devel
 %endif
 # We need both because the 'stap' binary is probed for by configure
 BuildRequires: systemtap
 BuildRequires: systemtap-sdt-devel
-# For VNC JPEG support
+# VNC JPEG support
 BuildRequires: libjpeg-devel
-# For VNC PNG support
+# VNC PNG support
 BuildRequires: libpng-devel
-# For Braille device support
+# Braille device support
 BuildRequires: brlapi-devel
-# For FDT device tree support
+# FDT device tree support
 BuildRequires: libfdt-devel
-# Hard requirement for version >= 1.3
+# QEMU display pixel manipulation
 BuildRequires: pixman-devel
 %if %{with_block_gluster}
-# For gluster support
+# gluster block driver
-BuildRequires: glusterfs-devel >= 3.4.0
+BuildRequires: glusterfs-api-devel
-BuildRequires: glusterfs-api-devel >= 3.4.0
 %endif
-# Needed for usb passthrough for qemu >= 1.5
+# USB passthrough
 BuildRequires: libusbx-devel
 # SSH block driver
 BuildRequires: libssh-devel
@@ -324,53 +320,53 @@ BuildRequires: rdma-core-devel
 BuildRequires: xen-devel
 %endif
 %if %{have_numactl}
-# qemu 2.1: needed for memdev hostmem backend
+# memdev hostmem backend
 BuildRequires: numactl-devel
 %endif
-# qemu 2.3: reading bzip2 compressed dmg images
+# reading bzip2 compressed dmg images
 BuildRequires: bzip2-devel
-# qemu 2.4: needed for opengl bits
+# opengl bits
 BuildRequires: libepoxy-devel
-# qemu 2.5: needed for TLS test suite
+# TLS test suite
 BuildRequires: libtasn1-devel
-# qemu 2.5: libcacard is it's own project now
+# smartcard device
-BuildRequires: libcacard-devel >= 2.5.0
+BuildRequires: libcacard-devel
 %if %{have_virgl}
-# qemu 2.5: virgl 3d support
+# virgl 3d support
 BuildRequires: virglrenderer-devel
 %endif
-# qemu 2.6: Needed for gtk GL support, vhost-user-gpu
+# gtk GL support, vhost-user-gpu
 BuildRequires: mesa-libgbm-devel
-# qemu 2.11: preferred disassembler for TCG
+# preferred disassembler for TCG
 BuildRequires: capstone-devel
-# qemu 2.12: parallels disk images require libxml2 now
+# parallels disk images require libxml2
 BuildRequires: libxml2-devel
 %if %{have_pmem}
-# qemu 3.1: Used for nvdimm
+# nvdimm
 BuildRequires: libpmem-devel
 %endif
-# qemu 3.1: Used for qemu-ga
+# qemu-ga
 BuildRequires: libudev-devel
-# qemu 4.0: Use for qauth infrastructure
+# qauth infrastructure
 BuildRequires: pam-devel
-# qemu 4.0: user-mode networking
+# user-mode networking
 BuildRequires: libslirp-devel
-# qemu 4.0: sphinx-build used for some docs
+# Documentation build
 BuildRequires: python3-sphinx
-# qemu 4.0: Used by test suite ./scripts/tap-driver.pl
+# Test suite ./scripts/tap-driver.pl
 BuildRequires: perl-Test-Harness
-# Required for making python shebangs versioned
+# For making python shebangs versioned
 BuildRequires: /usr/bin/pathfix.py
 BuildRequires: python3-devel
 %if %{have_liburing}
-# qemu 5.0 liburing support. Library isn't built for arm
+# liburing support. Library isn't built for arm
 BuildRequires: liburing-devel
 %endif
-# qemu 5.0 zstd compression support
+# zstd compression support
 BuildRequires: libzstd-devel
 # `hostname` used by test suite
 BuildRequires: hostname
-# Used for nvdimm dax
+# nvdimm dax
 BuildRequires: daxctl-devel
 
 BuildRequires: glibc-static pcre-static glib2-static zlib-static