Safe-target variable implementation

[prodigysml]

_safe-target_ was implemented within this PR. Example code:

> cat i
;cat</etc/passwd;
http://aol.com
';cat</etc/passwd;'
";cat</etc/passwd;"
"';cat</etc/passwd;'"

> interlace -tL i -c "echo _safe-target_" --no-cidr --sober                                                            ✔ 
=====================================================
Interlace v1.9.7	by Michael Skelton (@codingo_)
                  	& Sajeeb Lohani (@sml555_)
=====================================================
[12:40:57] [THREAD] [echo ';cat</etc/passwd;'] Added to Queue
[12:40:57] [THREAD] [echo "';cat</etc/passwd;'"] Added to Queue
[12:40:57] [THREAD] [echo ';cat</etc/passwd;'] Added to Queue
[12:40:57] [THREAD] [echo ";cat</etc/passwd;"] Added to Queue
';cat</etc/passwd;'

;cat</etc/passwd;

[12:40:57] [THREAD] [echo 'http://aol.com'] Added to Queue
;cat</etc/passwd;

;cat</etc/passwd;

http://aol.com

[prodigysml]

Big shoutout to ryotkak, pry0cc, and 0xtavian for notifying us of the issue and spitballing ideas of the fix! You're an epic bunch!