Added ability to disable git commands entirely

Especially useful because of the dangetous git-am behavior and its
short name (easily confused with my often used alias `am`).

dotfiles/bash/global-before.bashrc

 ### things to do BEFORE host/user-specific settings ###
 #######################################################
 
+### .... ###
+### SUBZ ###
+### '''' ###
+
+git() {
+    if grep -Fwqs "$1" "$GIT_DISABLED_COMMANDS"; then
+        echo "You don't want this." >&2
+        return 1
+    else
+        command git "$@"
+    fi
+}
+
 ### .... ###
 ### BASH ###
 ### '''' ###
 # make green git bash trinket even cooler
 export GIT_PS1_SHOWDIRTYSTATE=true
 export GIT_PS1_SHOWUNTRACKEDFILES=true
+export GIT_DISABLED_COMMANDS="$HOME/.git-universe/disabled-commands"
 
 # disable mounting things like SFTP to ~/.gvfs when accessed
 # via GIO (used by nautilus etc.)

dotfiles/git-universe/disabled-commands

+am