[strongswan/f20] (10 commits) ...New upstream release 5.2.0

[avesh]

Summary of changes:

  0ae42b4... New upstream developer release 5.2.0dr4 (*)
  220d279... clean up the patches a bit (*)
  54e666e... merge two related patches (*)
  30659b7... new version 5.2.0dr5 (*)
  8316778... add json-c-devel to build deps (*)
  34df288... fix the pre-release version according to guidelines before  (*)
  38171c6... Related: #1087437 - remove or upstream all patches not spec (*)
  a8a7cb9... Resolves: #1111895 - bump to 5.2.0dr6 (*)
  d89e1af... improve prerelease macro (*)
  6076fd4... New upstream release 5.2.0 (*)

(*) This commit already existed in another branch; no separate mail sent