Update Dockerfile

Dockerfile

@@ -52,8 +52,8 @@ RUN echo "deb-src http://deb.debian.org/debian buster main contrib" >> /etc/apt/
 		--enable-auth-digest="LDAP" \
 		--enable-auth-ntlm \
 		--enable-auth-negotiate \
-	        --with-krb5-config=no \
-	        --without-mit-krb5 \
+        --enable-negotiate-auth-helpers \
+	    --with-krb5-config=yes \
 		--enable-icap-client \
 		--sysconfdir=/etc/squid \
 		--with-filedescriptors=48000 \