liblzma: Add set lzma.h as the main page for Doxygen documentation.

The \mainpage command is used in the first block of comments in lzma.h.
This changes the previously nearly empty index.html to use the first
comment block in lzma.h for its contents.

lzma.h is no longer documented separately, but this is for the better
since lzma.h only defined a few macros that users do not need to use.
The individual API header files all have a disclaimer that they should
not be #included directly, so there should be no confusion on the fact
that lzma.h should be the only header used by applications.

Additionally, the note "See ../lzma.h for information about liblzma as
a whole." was removed since lzma.h is now the main page of the
generated HTML and does not have its own page anymore. So it would be
confusing in the HTML version and was only a "nice to have" when
browsing the source files.

src/liblzma/api/lzma.h

@@ -1,6 +1,7 @@
 /**
  * \file        api/lzma.h
  * \brief       The public API of liblzma data compression library
+ * \mainpage
  *
  * liblzma is a public domain general-purpose data compression library with
  * a zlib-like API. The native file format is .xz, but also the old .lzma

src/liblzma/api/lzma/base.h

@@ -2,8 +2,6 @@
  * \file        lzma/base.h
  * \brief       Data types and functions used in many places in liblzma API
  * \note        Never include this file directly. Use <lzma.h> instead.
- *
- * See ../lzma.h for information about liblzma as a whole.
  */
 
 /*

src/liblzma/api/lzma/bcj.h

@@ -2,8 +2,6 @@
  * \file        lzma/bcj.h
  * \brief       Branch/Call/Jump conversion filters
  * \note        Never include this file directly. Use <lzma.h> instead.
- *
- * See ../lzma.h for information about liblzma as a whole.
  */
 
 /*

src/liblzma/api/lzma/block.h

@@ -2,8 +2,6 @@
  * \file        lzma/block.h
  * \brief       .xz Block handling
  * \note        Never include this file directly. Use <lzma.h> instead.
- *
- * See ../lzma.h for information about liblzma as a whole.
  */
 
 /*

src/liblzma/api/lzma/check.h

@@ -2,8 +2,6 @@
  * \file        lzma/check.h
  * \brief       Integrity checks
  * \note        Never include this file directly. Use <lzma.h> instead.
- *
- * See ../lzma.h for information about liblzma as a whole.
  */
 
 /*

src/liblzma/api/lzma/container.h

@@ -2,8 +2,6 @@
  * \file        lzma/container.h
  * \brief       File formats
  * \note        Never include this file directly. Use <lzma.h> instead.
- *
- * See ../lzma.h for information about liblzma as a whole.
  */
 
 /*

src/liblzma/api/lzma/delta.h

@@ -2,8 +2,6 @@
  * \file        lzma/delta.h
  * \brief       Delta filter
  * \note        Never include this file directly. Use <lzma.h> instead.
- *
- * See ../lzma.h for information about liblzma as a whole.
  */
 
 /*

src/liblzma/api/lzma/filter.h

@@ -2,8 +2,6 @@
  * \file        lzma/filter.h
  * \brief       Common filter related types and functions
  * \note        Never include this file directly. Use <lzma.h> instead.
- *
- * See ../lzma.h for information about liblzma as a whole.
  */
 
 /*

src/liblzma/api/lzma/hardware.h

@@ -3,8 +3,6 @@
  * \brief       Hardware information
  * \note        Never include this file directly. Use <lzma.h> instead.
  *
- * See ../lzma.h for information about liblzma as a whole.
- *
  * Since liblzma can consume a lot of system resources, it also provides
  * ways to limit the resource usage. Applications linking against liblzma
  * need to do the actual decisions how much resources to let liblzma to use.

src/liblzma/api/lzma/index.h

@@ -2,8 +2,6 @@
  * \file        lzma/index.h
  * \brief       Handling of .xz Index and related information
  * \note        Never include this file directly. Use <lzma.h> instead.
- *
- * See ../lzma.h for information about liblzma as a whole.
  */
 
 /*

src/liblzma/api/lzma/index_hash.h

@@ -3,8 +3,6 @@
  * \brief       Validate Index by using a hash function
  * \note        Never include this file directly. Use <lzma.h> instead.
  *
- * See ../lzma.h for information about liblzma as a whole.
- *
  * Hashing makes it possible to use constant amount of memory to validate
  * Index of arbitrary size.
  */

src/liblzma/api/lzma/lzma12.h

@@ -2,8 +2,6 @@
  * \file        lzma/lzma12.h
  * \brief       LZMA1 and LZMA2 filters
  * \note        Never include this file directly. Use <lzma.h> instead.
- *
- * See ../lzma.h for information about liblzma as a whole.
  */
 
 /*

src/liblzma/api/lzma/stream_flags.h

@@ -2,8 +2,6 @@
  * \file        lzma/stream_flags.h
  * \brief       .xz Stream Header and Stream Footer encoder and decoder
  * \note        Never include this file directly. Use <lzma.h> instead.
- *
- * See ../lzma.h for information about liblzma as a whole.
  */
 
 /*

src/liblzma/api/lzma/version.h

@@ -2,8 +2,6 @@
  * \file        lzma/version.h
  * \brief       Version number
  * \note        Never include this file directly. Use <lzma.h> instead.
- *
- * See ../lzma.h for information about liblzma as a whole.
  */
 
 /*

src/liblzma/api/lzma/vli.h

@@ -3,8 +3,6 @@
  * \brief       Variable-length integer handling
  * \note        Never include this file directly. Use <lzma.h> instead.
  *
- * See ../lzma.h for information about liblzma as a whole.
- *
  * In the .xz format, most integers are encoded in a variable-length
  * representation, which is sometimes called little endian base-128 encoding.
  * This saves space when smaller values are more likely than bigger values.