Update readme to match index of mkdocs (#1515)

README.md

@@ -4,23 +4,30 @@
 [FUSE](https://en.wikipedia.org/wiki/Filesystem_in_Userspace) based
 [union filesystem](https://en.wikipedia.org/wiki/Union_mount) geared
 towards simplifying storage and management of files across numerous
-commodity storage devices. It is similar to **mhddfs**, **unionfs**,
-and **aufs**.
+commodity storage devices. It is similar to [**mhddfs**, **unionfs**,
+**aufs**, **DrivePool**,
+etc.](https://trapexit.github.io/mergerfs/latest/project_comparisons/)
+
 
 ## Features
 
 * Logically combine numerous filesystems/paths into a single
-  mount point
+  mount point (JBOFS: Just a Bunch of FileSystems)
 * Combine paths of the same or different filesystems
 * Ability to add or remove filesystems/paths without impacting the
   rest of the data
 * Unaffected by individual filesystem failure
 * Configurable file selection and creation placement
+* File IO
+  [passthrough](https://trapexit.github.io/mergerfs/latest/config/passthrough/)
+  for near native IO performance (where supported)
 * Works with filesystems of any size
-* Works with filesystems of almost any type
+* Works with filesystems of [almost any
+  type](https://trapexit.github.io/mergerfs/latest/faq/compatibility_and_integration/#what-filesystems-can-be-used-as-branches)
 * Ignore read-only filesystems when creating files
-* Hard link copy-on-write / CoW
-* Runtime configurable
+* Hard link [copy-on-write /
+  CoW](https://trapexit.github.io/mergerfs/latest/config/link_cow/)
+* [Runtime configurable](https://trapexit.github.io/mergerfs/latest/runtime_interface/)
 * Support for extended attributes (xattrs)
 * Support for file attributes (chattr)
 * Support for POSIX ACLs
@@ -30,16 +37,17 @@ and **aufs**.
 
 * Read/write overlay on top of read-only filesystem like OverlayFS
 * File whiteout
-* RAID like parity calculation
+* RAID like parity calculation (see [SnapRAID](https://www.snapraid.it))
 * Redundancy
 * Splitting of files across branches
 
 
 ## How it works
 
-mergerfs logically merges multiple filesystem paths together. It acts
-as a proxy to the underlying filesystem paths. Combining the behaviors
-of some functions and being a selector for others.
+mergerfs logically merges multiple filesystem paths together. Not
+block devices, not filesystem mounts, just paths. It acts as a proxy
+to the underlying filesystem paths. Combining the behaviors of some
+functions and being a selector for others.
 
 When the contents of a directory are requested mergerfs combines the
 list of files from each directory, deduplicating entries, and returns
@@ -52,7 +60,7 @@ For functions which change attributes or remove the file the behavior
 may be applied to all instances found.
 
 Read more about [policies
-here](https://trapexit.github.io/mergerfs/config/functions_categories_policies/).
+here](https://trapexit.github.io/mergerfs/latest/config/functions_categories_policies/).
 
 
 ### Visualization
@@ -63,24 +71,26 @@ A         +      B        =       C
 |                |                |
 +-- /dir1        +-- /dir1        +-- /dir1
 |   |            |   |            |   |
-|   +-- file1    |   +-- file2    |   +-- file1
-|                |   +-- file3    |   +-- file2
-+-- /dir2        |                |   +-- file3
-|   |            +-- /dir3        |
-|   +-- file4        |            +-- /dir2
-|                     +-- file5   |   |
-+-- file6                         |   +-- file4
-                                  |
-                                  +-- /dir3
-                                  |   |
-                                  |   +-- file5
-                                  |
-                                  +-- file6
+|   +-- file1    |   |            |   +-- file1
+|                |   +-- file2    |   +-- file2
+|                |   +-- file3    |   +-- file3
+|                |                |
++-- /dir2        |                +-- /dir2
+|   |            |                |   |
+|   *-- file4    |                |   +-- file4
+|                |                |
+|                +-- /dir3        +-- /dir3
+|                |   |            |   |
+|                |   +-- file5    |   +-- file5
+|                |                |
++-- file6        |                +-- file6
++-- file7        +-- file7        +-- file7
 ```
 
+
 ## QuickStart
 
-https://trapexit.github.io/mergerfs/quickstart/
+https://trapexit.github.io/mergerfs/latest/quickstart/
 
 
 ## Documentation
@@ -90,7 +100,7 @@ https://trapexit.github.io/mergerfs
 
 ## Support
 
-https://trapexit.github.io/mergerfs/support/
+https://trapexit.github.io/mergerfs/latest/support/
 
 
 ## Sponsorship and Donations