Re-organize the shells' initialization logic

- unify ~/.config/shell/aliases.sh and ~/.config/shell/utils.sh
  into a common ~/.config/shell/init.sh
- split the contents of ~/.config/shell/aliases.sh
  into the folder ~/.config/shell/aliases.d
- split the contents of ~/.config/shell/utils.sh
  into the folder ~/.config/shell/utils.d

.config/shell/utils.d/passwords.sh

@@ -0,0 +1,80 @@
+# The utilities defined here allow to create random login credentials
+
+
+# Generate random passwords that are accepted by most services
+genpw() {
+    PARSED=$(getopt --quiet --options=acn: --longoptions=alphanum,clip,chars: -- "$@")
+    eval set -- "$PARSED"
+    SYMBOLS='--symbols'
+    CHARS=30
+    XCLIP=false
+    while true; do
+        case "$1" in
+            -a|--alphanum)
+                SYMBOLS=''
+                shift
+                ;;
+            -c|--clip)
+                XCLIP=true
+                shift
+                ;;
+            -n|--chars)
+                CHARS=$2
+                shift 2
+                ;;
+            --)
+                shift
+                break
+                ;;
+            *)
+                break
+                ;;
+        esac
+    done
+    PW=$(pwgen --ambiguous --capitalize --numerals --secure $SYMBOLS --remove-chars="|/\\\"\`\'()[]{}<>^~@§$\#" $CHARS 1)
+    if [[ $XCLIP == true ]]; then
+        echo $PW | xclip -selection c
+    else
+        echo $PW
+    fi
+}
+
+alias genpw-alphanum='pwgen --ambiguous --capitalize --numerals --secure 30 1'
+
+
+# Random email addresses that look like "normal" ones
+genemail() {
+    PARSED=$(getopt --quiet --options=c --longoptions=clip -- "$@")
+    eval set -- "$PARSED"
+    XCLIP=false
+    while true; do
+        case "$1" in
+            -c|--clip)
+                XCLIP=true
+                shift
+                ;;
+            --)
+                shift
+                break
+                ;;
+            *)
+                break
+                ;;
+        esac
+    done
+    FIRST=$(shuf -i 4-5 -n 1)
+    LAST=$(shuf -i 8-10 -n 1)
+
+    if _command_exists gpw; then
+        USER="$(gpw 1 $FIRST).$(gpw 1 $LAST)@webartifex.biz"
+    else
+        # Fallback that looks a bit less "normal"
+        USER="$(pwgen --no-capitalize --no-numerals --secure $FIRST 1).$(pwgen --no-capitalize --no-numerals --secure $LAST 1)@webartifex.biz"
+    fi
+
+    if [[ $XCLIP == true ]]; then
+        echo $USER | xclip -selection c
+    else
+        echo $USER
+    fi
+}