mergerfs-1.7.0

• d30cae2 add user.mergerfs.allpaths and user.mergerfs.relpath to getxattr
• 2e95c6e merge action and search category
• b411c63 Remove 'all' policy and simplify logic
• 1f90203 use standard platform macros. closes #43
• c2cbb93 elevate privileges when calling clonepath. closes #41
• 6276ce9 handle EEXIST while cloning a path. closes #40
• d1f3bd8 add clonepath tool
• 031b87f slight refactoring
• 5dd0729 remove longest common prefix from fsname. closes #38