Refactor README

Add new option, and have install script mention README for details.

README.md

@@ -4,26 +4,28 @@ The code was reworked from legacy dropbear_initrd_encrypt AUR package.
 
 ## Installation
 After cloning the repo, installation is done as for an AUR package, e.g.:
-
+```bash
 makepkg -sri
-
+```
 
 ## Dropbear
 SSH server key need to be generated for `dropbear`.  
 Either a new key can be generated with `dropbearkey`, e.g.:
-
+```bash
 dropbearkey -t ecdsa -f /etc/dropbear/dropbear_ecdsa_host_key
+```
 Or an existing OpenSSH key can be converted with `dropbearconvert` (useful so that the server fingerprint is the same with both), e.g.:
-
+```bash
 dropbearconvert openssh dropbear /etc/ssh/ssh_host_ecdsa_key /etc/dropbear/dropbear_ecdsa_host_key
+```
 Notes:
    * `rsa` and `ed25519` types are also handled
    * OpenSSH keys must be in `PEM` format for `dropbearconvert` to properly work
 
 If necessary an existing key file can be converted to `PEM` format using `ssh-keygen`:
-
+```bash
 ssh-keygen -A -p -m PEM -f /etc/ssh/ssh_host_ecdsa_key
-
+```
 
 ## Configuration
 As explained upon installation, the following things need to be done:
@@ -38,13 +40,18 @@ The LUKS-encrypted devices to unlock are derived from `/etc/crypttab`.
 
 
 Some options can be set in `/etc/initcpio/sshcs_env` (file is sourced in initramfs shell):
+   * `sshcs_opt_log_kmsg`: whether to log (debug, info, error) messages to kmsg too
+      - default: `1`
+      - many messages are only printed on console and are not concerned
+      - by default (debug disabled), only useful messages are concerned
+      - set `0` to disable
    * `sshcs_opt_debug`: whether to be more verbose about ongoing actions
       - default: `0`
       - any non-zero value to enable
    * `sshcs_opt_net_wol`: Wake-on-LAN option to set on network device
       - default: `g` (MagicPacket™)
-      - usually WOL is disabled once in initramfs shell
-      - set empty to not change network device WOL setting
+      - usually WoL is disabled once in initramfs shell
+      - set empty to not change network device WoL setting
    * `sshcs_opt_timeout_ipconfig`: time (in seconds) to configure IP
       - default: `10`
    * `sshcs_opt_listen`: SSH listening port
@@ -58,12 +65,12 @@ Some options can be set in `/etc/initcpio/sshcs_env` (file is sourced in initram
       - when disabled (the default), a script to unlock devices is executed instead
 
 For example:
-
+```bash
 sshcs_opt_timeout_ipconfig=30
 sshcs_opt_listen=2222
 sshcs_opt_timeout_poweroff=-1
 sshcs_opt_use_shell=1
-
+```
 
 ## Building notes
 1. Modify the sources (features in `src`, and/or package building files)

src/install/ssh-cryptsetup

@@ -54,7 +54,7 @@ build() {
 
   # Note: parts of this script (modules/binaries/files added) are the same than
   # other install scripts (/usr/lib/initcpio/install/):
-  #   - 'encryp': nominal support of encrypted volumes at boot time
+  #   - 'encrypt': nominal support of encrypted volumes at boot time
   #   - 'net': network tools
 
   ## Modules
@@ -129,27 +129,8 @@ Network is configured with 'ip=' kernel parameter (see 'mkinitcpio-nfs-utils').
 Authorized SSH key(s) must be present in '/etc/dropbear/initrd.authorized_keys'.
 LUKS encrypted devices to unlock are derived from '/etc/crypttab', which must
 be present.
-Some options can be set in '/etc/initcpio/sshcs_env' (file is sourced in
-initrd shell):
- * 'sshcs_opt_debug': whether to be more verbose about ongoing actions
-   - default: '0'
-   - any non-zero value to enable
- * 'sshcs_opt_net_wol': Wake-on-LAN option to set on network device
-   - default: 'g' (MagicPacket™)
-   - usually WOL is disabled once in initramfs shell
-   - set empty to not change network device WOL setting
- * 'sshcs_opt_timeout_ipconfig': time (in seconds) to configure IP
-   - default: '10'
- * 'sshcs_opt_listen': SSH listening port
-   - default: '22'
- * 'sshcs_opt_timeout_poweroff': time (in seconds) to unlock devices before
-   automatic powering off
-   - default (and minimum value): '120' (2 minutes)
-   - negative value to deactivate
- * 'sshcs_opt_use_shell': whether to start a full 'ash' shell
-   - default: '0'
-   - '1' to enable
-   - when disabled (the default), a script to unlock devices is executed instead
+Some options can be set in '/etc/initcpio/sshcs_env'.
+See the README for more details.
 
 Each SSH server key ('dropbear_rsa_host_key', 'dropbear_ecdsa_host_key' and
 'dropbear_ed25519_host_key' in '/etc/dropbear' folder) is imported from OpenSSH