Description of problem:
man pages for "trace" conflict once one is installed:
```
<snip>
Total size: 1.4 M
Installed size: 3.9 M
Is this ok [y/N]: y
Downloading Packages:
[SKIPPED] postfix-3.2.4-1.fc26.x86_64.rpm: Already downloaded                                                                                                                                                                                                 
Running transaction check
Transaction check succeeded.
Running transaction test
The downloaded packages were saved in cache until the next successful transaction.
You can remove cached packages by executing 'dnf clean packages'.
Error: Transaction check error:
  file /usr/share/man/man8/trace.8.gz from install of postfix-2:3.2.4-1.fc26.x86_64 conflicts with file from package bcc-tools-0.4.0-1.fc26.noarch

Error Summary
------------
```

Version-Release number of selected component (if applicable):
postfix-3.2.4-1.fc26.x86_64
bcc-tools-0.4.0-1.fc26.noarch

How reproducible:
just install one of the packages first bcc-tools or postfix, then try to install the other one, the conflict should be observable

Steps to Reproduce:
1. dnf install -y bcc-tools
2. dnf install -y postfix
3.

Actual results:


Expected results:
Both packages install along side, this would be useful in server environments occasionally in desktop environments 

Additional info: