[freebsd91p7][idfile][git] 1. New undelete_try. 2. Backup old freebsd91p7.

1. idfile: Add new undelete_try to easily check files in trashcan.
2. git: backup freebsd91p7 files and remove from file system. therefore
reset .gitignore for existing files only.
[freebsd91p7] Merge from branch master.

Removing files not used in master.