Fixes "section not found" when using -s

When using -s command line switch, lookup of gitftpignore
info from .git/ftpdata file fails as the switch is ignored
there and the branch name is used. This commit fixes the bug.
Merge pull request #73 from dl1ely/master

"Section not found" error when using -s switch on differently named branch
Merge remote-tracking branch 'upstream/master' into develop
Update from upstream