Fix EPEL build

sysbench.spec

@@ -1,7 +1,7 @@
 Summary:       System performance benchmark
 Name:          sysbench
 Version:       1.0.17
-Release:       1%{?dist}
+Release:       2%{?dist}
 License:       GPLv2+
 Source0:       https://github.com/akopytov/%{name}/archive/%{version}/%{name}-%{version}.tar.gz
 URL:           https://github.com/akopytov/sysbench/
@@ -16,13 +16,17 @@ BuildRequires: luajit-devel
 %if 0%{?el6}
 BuildRequires: mysql-devel
 %endif
-%if 0%{?el7} || 0%{?fc26}%{?fc27}
+%if 0%{?el7}
 BuildRequires: mariadb-devel
 %endif
-%if 0%{?fedora} > 27
+%if 0%{?fedora} || 0%{?rhel} > 7
 BuildRequires: mariadb-connector-c-devel
 %endif
+%if 0%{?fedora} || 0%{?rhel} > 7
 BuildRequires: libpq-devel
+%else
+BuildRequires: postgresql-devel
+%endif
 # Tests
 %{!?el6:BuildRequires: /usr/bin/cram}
 
@@ -100,6 +104,10 @@ rm t/opt_report_interval.t
 
 
 %changelog
+* Fri Mar 15 2019 Xavier Bachelot <xavier@bachelot.org> 1.0.17-2
+- Fix EPEL build.
+- Clean up conditionals around BuildRequires.
+
 * Fri Mar 15 2019 Xavier Bachelot <xavier@bachelot.org> 1.0.17-1
 - Update to 1.0.17 (RHBZ#1689249).