add mkpasswd: hash a password for use in /etc/shadow or htpasswd

mkpasswd is finally available packaged on Arch, so add it to allow
manually replacing a password in /etc/shadow, for when chroots or
pam don't work as wanted. Also supports advanced hash algos like
yescrypt that can't be set via the pam stack yet.

Because the source for mkpasswd is part of the whois package, it
is currently packaged as part of whois. But it might get it's own
package in the future, so add a check for /usr/bin/mkpasswd during
build time.

ChangeLog

@@ -12,6 +12,7 @@ https://gitlab.com/systemrescue/systemrescue-sources/-/issues/278
 * Don't waste ram when using the archiso_http_srv option (#56)
 * mountall: run udevadm settle to mount newly opened cryptodisks, improve messages
 * Add rclone option to the "sysconfig" scope of YAML config file, it writes a rclone.conf file
+* Added packages: whois (mkpasswd)
 
 ------------------------------------------------------------------------------
 9.04 (2022-08-07):

airootfs/usr/bin/check-binaries.sh

@@ -21,9 +21,19 @@ do
 
 done
 
+# check for missing programs
+# mkpasswd might be packaged separately from whois in the future
+for curfile in /usr/bin/mkpasswd ; \
+do
+   if ! [[ -x "${curfile}" ]]; then
+        echo "ERROR: Program ${curfile} is missing"
+        errcnt=$((errcnt + 1))
+    fi
+done
+
 if [ ${errcnt} -eq 0 ]
 then
-    echo "SUCCESS: Have not found any missing library"
+    echo "SUCCESS: Have not found any missing library or program"
     exit 0
 else
     echo "FAILURE: Have found ${errcnt} issues"

packages

@@ -246,6 +246,7 @@ vpnc
 wget
 whdd
 which
+whois
 wimlib
 wipe
 wireguard-tools