Compute samfac values; put them into "lab5" (for K1JT only).
Ransomize the rand() seed on SoundOutThread startup.
Increase the DT search range. (This still needs optimization.)
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@2724 ab8295b8-cf94-4d9e-aec4-7959e3be5d79