Build with zstd support

Also remove double % in Source0 tag that breaks mock builds.

Resolves: #2091041

boost.spec

@@ -42,7 +42,7 @@ Name: boost
 %global real_name boost
 Summary: The free peer-reviewed portable C++ source libraries
 Version: 1.75.0
-Release: 6%{?dist}
+Release: 7%{?dist}
 License: Boost and MIT and Python
 
 # Replace each . with _ in %%{version}
@@ -54,7 +54,7 @@ License: Boost and MIT and Python
 %global toplev_dirname %{real_name}_%{version_enc}
 URL: http://www.boost.org
 
-Source0: https://dl.bintray.com/boostorg/release/%{version}/source/%{name}_%%{version_enc}.tar.bz2
+Source0: https://dl.bintray.com/boostorg/release/%{version}/source/%{name}_%{version_enc}.tar.bz2
 Source1: libboost_thread.so
 # Add a manual page for b2, based on the online documentation:
 # http://www.boost.org/boost-build2/doc/html/bbv2/overview.html
@@ -114,6 +114,7 @@ BuildRequires: libstdc++-devel
 BuildRequires: bzip2-devel
 BuildRequires: zlib-devel
 BuildRequires: xz-devel
+BuildRequires: libzstd-devel
 %if %{with python3}
 BuildRequires: python3-devel
 BuildRequires: python3-numpy
@@ -1278,6 +1279,9 @@ fi
 %{_mandir}/man1/b2.1*
 
 %changelog
+* Tue Jun 21 2022 Jonathan Wakely <jwakely@redhat.com> - 1.75.0-7
+- Build with zstd support (#2091041)
+
 * Mon Aug 09 2021 Mohan Boddu <mboddu@redhat.com> - 1.75.0-6
 - Rebuilt for IMA sigs, glibc 2.34, aarch64 flags
   Related: rhbz#1991688