[PATCH v10 8/8] user_manual.md: Update boostrap related documentation

[Anton Mikanovich <amikan@ilbers.de>]

Update documentation in user manual and recipes API changelog.

Signed-off-by: Anton Mikanovich <amikan@ilbers.de>
---
 RECIPE-API-CHANGELOG.md | 13 +++++++++++++
 doc/user_manual.md      | 15 ++++++++++++---
 2 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/RECIPE-API-CHANGELOG.md b/RECIPE-API-CHANGELOG.md
index 12ea93ec..589dae66 100644
--- a/RECIPE-API-CHANGELOG.md
+++ b/RECIPE-API-CHANGELOG.md
@@ -629,3 +629,16 @@ into kernel kbuild package.
     Only the "host" specific package is built automatically at cross builds.
 
   * Support emulated module build with cross-compiled kernel for linux-module
+
+### Default boostrap recipe changed to mmdebstrap
+
+New virtual packages bootstrap-host and bootstrap-target are introduced.
+There are two providers of bootstrap-host/-target currently:
+  * isar-mmdebstrap: deafult one using mmdebstrap to prepare rootfs
+  * isar-bootstrap: previous bootstrap implementation left for compatibility
+
+So default bootstrap procedure is now performing with mmdebstrap.
+Previous implementation still can be selected by setting in local.conf:
+
+PREFERRED_PROVIDER_bootstrap-host ?= "isar-bootstrap-host"
+PREFERRED_PROVIDER_bootstrap-target ?= "isar-bootstrap-target"
diff --git a/doc/user_manual.md b/doc/user_manual.md
index 776ae52c..552b1d8c 100644
--- a/doc/user_manual.md
+++ b/doc/user_manual.md
@@ -66,7 +66,8 @@ The steps below describe how to build the images provided by default.
 
 ### Install Host Tools
 
-The supported host system is >= buster.
+The supported host system is >= buster for debootstrap and >= bullseye for
+default mmdebstrap provider.
 
 Building `debian-trixie` requires host system >= bookworm.
 
@@ -75,7 +76,9 @@ Install the following packages:
 apt install \
   binfmt-support \
   bzip2 \
-  debootstrap \
+  mmdebstrap \
+  arch-test \
+  apt-utils \
   dpkg-dev \
   gettext-base \
   git \
@@ -93,6 +96,12 @@ apt install \
   zstd
 ```
 
+If using isar-bootstrap provider, debootstrap should be installed instead of
+mmdebstrap:
+```
+apt install debootstrap
+```
+
 If your host is >= buster, also install the following package.
 ```
 apt install python3-distutils
@@ -135,7 +144,7 @@ apt install qemu
 
 ### Setup Sudo
 
-Isar requires `sudo` rights without password to work with `chroot` and `debootstrap`. To add them, use the following steps:
+Isar requires `sudo` rights without password to work with `chroot`. To add them, use the following steps:
 ```
  # visudo
 ```
-- 
2.34.1

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