Use "grep -E" instead of the obsoleted "egrep"

- Resolves: BZ#2140197
- mark LICENSE as %license
- Spec cleanup
- Small patches, as a rule, are in git dist, to be more easy to read.

xdg-utils.spec

@@ -78,7 +78,7 @@ The following scripts are provided at this time:
 %configure
 
 %if 0%{?snap:1}
-make scripts-clean -C scripts 
+make scripts-clean -C scripts
 make man scripts %{?_smp_mflags} -C scripts
 %endif
 %make_build