Unix VSIL: reset eof in all cases in Seek()

git-svn-id: https://svn.osgeo.org/gdal/trunk@27492 f0d54148-0727-0410-94bb-9a71ac55c965
cpl_error: obfuscate password

git-svn-id: https://svn.osgeo.org/gdal/trunk@27493 f0d54148-0727-0410-94bb-9a71ac55c965
Merge branch 'trunk' into trunk_travis_macosx