lib: add ability to disable magic functions

Fixes #5499
Fixes #5569
Fixes #6338
Fixes #6654
Fixes #6255
Fixes #7632

Closes #7763
Co-authored-by: Daniel Galán y Martins <git@galan.de>

lib/misc.zsh

-## Load smart urls if available
-# bracketed-paste-magic is known buggy in zsh 5.1.1 (only), so skip it there; see #4434
 autoload -Uz is-at-least
-if [[ $ZSH_VERSION != 5.1.1 ]]; then
+
+# *-magic is known buggy in some versions; disable if so
+if [[ $DISABLE_MAGIC_FUNCTIONS != true ]]; then
   for d in $fpath; do
   	if [[ -e "$d/url-quote-magic" ]]; then
   		if is-at-least 5.1; then

templates/zshrc.zsh-template

@@ -32,6 +32,9 @@ ZSH_THEME="robbyrussell"
 # Uncomment the following line to change how often to auto-update (in days).
 # export UPDATE_ZSH_DAYS=13
 
+# Uncomment the following line if pasting URLs and other text is messed up.
+# DISABLE_MAGIC_FUNCTIONS=true
+
 # Uncomment the following line to disable colors in ls.
 # DISABLE_LS_COLORS="true"