Replace `dt` alias with more powerfule functions

dotfiles/bash/main.bashrc

 ### SUBZ ###
 ### '''' ###
 
+
+dt() {
+    #
+    # Open $1 new terminals
+    #
+    __bashum_run_n "${1:-1}" urxvt
+}
+
+dT() {
+    #
+    # Open $1 new alterminals
+    #
+    __bashum_run_n "${1:-1}" xfce4-terminal
+}
+
+__bashum_run_n() {
+    #
+    # Run $2 in background $1 times
+    #
+    local n=${1:-1}
+    while test "$n" -gt 0;
+    do
+        "$2" &
+        ((n--))
+    done
+}
+
 git() {
     #
     # /usr/bin/git wrapper just to disable dangerous commands
 shopt -s histverify
 
 # some more aliases
-alias dt='urxvt &'
 alias cal='cal -m'
 alias cls='clear'
 alias ll='ls -lh'