Description of problem:
When config file links to non-existing file, rpmconf crashes:

$ sudo rpmconf -a
Traceback (most recent call last):
  File "/sbin/rpmconf", line 63, in <module>
    main()
  File "/sbin/rpmconf", line 60, in main
    rconf.run()
  File "/usr/lib/python3.4/site-packages/rpmconf/rpmconf.py", line 90, in run
    self._handle_package(pkg_hdr)
  File "/usr/lib/python3.4/site-packages/rpmconf/rpmconf.py", line 264, in _handle_package
    tmp.format(conf_file, "rpmnew"))
  File "/usr/lib/python3.4/site-packages/rpmconf/rpmconf.py", line 273, in _handle_rpmnew
    if filecmp.cmp(conf_file, other_file):
  File "/usr/lib64/python3.4/filecmp.py", line 51, in cmp
    s1 = _sig(os.stat(f1))
FileNotFoundError: [Errno 2] No such file or directory: '/etc/mock/default.cfg'

$ ll /etc/mock/default.cfg
lrwxrwxrwx. 1 root root 20 Oct 14  2014 /etc/mock/default.cfg -> fedora-20-x86_64.cfg

$ ll /etc/fedora-20-x86_64.cfg
ls: cannot access /etc/fedora-20-x86_64.cfg: No such file or directory

Version-Release number of selected component (if applicable):
rpmconf-1.0.12-1.fc23.noarch

How reproducible:
Always

Steps to Reproduce:
1. Run rpmconf -a in above scenario
2.
3.

Actual results:
rpmconf crashes with Python traceback

Expected results:
rpmconf does not crash

Additional info: