Update docs concerning BMFF-based files (#2404)

* Update docs concerning BMFF-based files

* Fix minor issues in documentation

Author: postscript-dev

README.md

@@ -49,7 +49,7 @@ The file ReadMe.txt in a build bundle describes how to install the library on th
    16. [Cross Platform Build and Test on Linux for MinGW](#2-16)
    17. [Building with C++11 and other compilers](#2-17)
    18. [Static and Shared Libraries](#2-18)
-   19. [Support for bmff files (CR3, HEIF, HEIC, and AVIF)](#2-19)
+   19. [Support for BMFF files (e.g., CR3, HEIF, HEIC, AVIF, and JPEG XL)](#2-19)
 3. [License and Support](#3)
     1. [License](#3-1)
     2. [Support](#3-2)
@@ -620,7 +620,7 @@ int main(int argc, const char* argv[])
     ...
 }
 ```
-The use of the _**thread unsafe function**_ Exiv2::enableBMFF(true) is discussed in [2.19 Support for bmff files](#2-19)
+The use of the _**thread unsafe function**_ Exiv2::enableBMFF(true) is discussed in [2.19 Support for BMFF files (e.g., CR3, HEIF, HEIC, AVIF, and JPEG XL)](#2-19)
 
 [TOC](#TOC)
 <div id="2-15">
@@ -806,19 +806,19 @@ This is discussed: [https://github.com/Exiv2/exiv2/issues/1230](https://github.c
 [TOC](#TOC)
 <div id="2-19">
 
-### 2.19 Support for bmff files (CR3, HEIF, HEIC, and AVIF)
+### 2.19 Support for BMFF files (e.g., CR3, HEIF, HEIC, AVIF, and JPEG XL)
 
-**Attention is drawn to the possibility that bmff support may be the subject of patent rights. _Exiv2 shall not be held responsible for identifying any or all such patent rights.  Exiv2 shall not be held responsible for the legal consequences of the use of this code_.**
+**Attention is drawn to the possibility that BMFF support may be the subject of patent rights. _Exiv2 shall not be held responsible for identifying any or all such patent rights.  Exiv2 shall not be held responsible for the legal consequences of the use of this code_.**
 
-Access to the bmff code is guarded in two ways.  Firstly, you have to build the library with the cmake option: `-DEXIV2_ENABLE_BMFF=On`.  Secondly, the application must enable bmff support at run-time by calling the following function.
+Access to the BMFF code is guarded in two ways.  Firstly, you have to build the library with the cmake option: `-DEXIV2_ENABLE_BMFF=On`.  Secondly, the application must enable BMFF support at run-time by calling the following function.
 
 ```cpp
 EXIV2API bool enableBMFF(bool enable);
 ```
 
-The return value from `enableBMFF()` is true if the library has been build with bmff support (cmake option -DEXIV2_ANABLE_BMFF=On).
+The return value from `enableBMFF()` is true if the library has been build with BMFF support (cmake option -DEXIV2_ANABLE_BMFF=On).
 
-Applications may wish to provide a preference setting to enable bmff support and thereby place the responsibility for the use of this code with the user of the application.
+Applications may wish to provide a preference setting to enable BMFF support and thereby place the responsibility for the use of this code with the user of the application.
 
 [TOC](#TOC)
 <div id="3">

man/man1/exiv2.1

@@ -2,7 +2,7 @@
 .\" First parameter, NAME, should be all caps
 .\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
 .\" other parameters are allowed: see man(7), man(1)
-.TH EXIV2 1 "August 10, 2021"
+.TH EXIV2 1 "November 02, 2022"
 .\" Please adjust this date whenever revising the manpage.
 .\"
 .\" Some roff macros, for reference:
@@ -53,6 +53,7 @@ HEIC	Read	Read	Read	-	-
 HEIF	Read	Read	Read	-	-
 JP2	Read/Write	Read/Write	Read/Write	-	Read/Write
 JPEG	Read/Write	Read/Write	Read/Write	Read/Write	Read/Write
+JPEG XL	Read	Read	Read	-	-
 MRW	Read	Read	Read	-	-
 NEF	Read/Write	Read/Write	Read/Write	-	Read/Write
 ORF	Read/Write	Read/Write	Read/Write	-	-
@@ -76,6 +77,19 @@ image are determined.
 .IP \(bu 2
 Reading other TIFF-like RAW image formats, which are not listed in the
 table, may also work.
+.IP \(bu 2
+Support for BMFF file types such as CR3, HEIF, HEIC, AVIF, and 
+JPEG XL is a build option. To check if this is enabled, use: 
+.PP
+.in +4n
+.EX
+$ exiv2 --version --verbose | grep bmff
+enable_bmff=1
+.EE
+.in
+.PP
+.IP \(bu 2
+Naked codestream JPEG XL files do not contain Exif, IPTC, or XMP metadata.
 .SH ACTIONS
 The \fIaction\fP argument is only required if it is not clear from the
 \fIoptions\fP which action is implied.