Misc doc updates + add logo

mkdocs/docs/config/options.md

@@ -1,9 +1,18 @@
 # Options
 
-These options are the same regardless of whether you use them with the
-`mergerfs` commandline program, in fstab, or in a config file.
+mergerfs has many options to control it many features. For the average
+use case the options listed in the [quickstart](../quickstart.md) are
+sufficient. Most options are related to operating system or filesystem
+related concepts so having a [basic
+background](../intro_to_filesystems.md) in such things is recommended
+for more advanced configurations.
 
-### types
+These option names and values are the same regardless of whether you
+use them with the `mergerfs` commandline program, in fstab, or in a
+config file.
+
+
+## types
 
 - BOOL = 'true' | 'false'
 - INT = [MIN_INT,MAX_INT]
@@ -18,7 +27,7 @@ These options are the same regardless of whether you use them with the
 - POLICY = mergerfs function [policy](functions_categories_policies.md)
 
 
-### mount options
+## mount options
 
 - **config**: Path to a config file. Same arguments as below in
   key=val / ini style format.

mkdocs/docs/faq/why_isnt_it_working.md

@@ -247,3 +247,13 @@ Be sure to set
 or use Linux kernel v6.6 or above. rtorrent and some other
 applications use [mmap](http://linux.die.net/man/2/mmap) to read and
 write to files and offer no fallback to traditional methods.
+
+
+## Why don't I see mergerfs options in mount command or /proc/mounts?
+
+FUSE filesystems, such as mergerfs, are interpreting most of the
+possible options rather than being given to the kernel where those
+options in the `mount` command and /proc/mounts come from.
+
+If you want to see the options of a running instance of mergerfs you
+can use the [runtime interface](../runtime_interfaces.md).

mkdocs/docs/project_comparisons.md

@@ -101,6 +101,15 @@ used those other technologies. Meaning you can't create a file greater
 than 1TB on a pool of 2 1TB filesystems.
 
 
+## BTRFS Single Data Profile
+
+[BTRFS'](https://btrfs.readthedocs.io) `single` data profile is
+similar to RAID0 but BTRFS can more explicitly place data and metadata
+on multiple devices. However, like RAID0 and similar technologies if a
+single device fails you may lose all data in the pool. BTRFS does have
+some abilities to recover data but this is not guaranteed.
+
+
 ## RAID5, RAID6
 
 * [RAID5](https://en.wikipedia.org/wiki/Standard_RAID_levels#RAID_5)

mkdocs/mkdocs.yml

@@ -7,7 +7,7 @@ edit_uri: edit/master/mkdocs/docs/
 docs_dir: docs
 theme:
   name: material
-  logo: logo.jpeg
+  logo: logo.png
   features:
   - content.action.edit
   - content.action.view