CHG: updated helptext for lf t55xx bruteforce

ADD: a ROL function in util.c
ADD: two pwdgen functions in cmdhfmfu.c,  call them with a 7byte UID and get a 4byte number back. Will see if it can be connected with the "hf mfu info" command,  make data extraction easier later on.
ADD: added some more easy pwd in the dictionary file default_pwd.dic

client/default_pwd.dic

@@ -72,4 +72,36 @@ AABBCCDD,
 BBCCDDEE,
 CCDDEEFF,
 0CB7E7FC,  //rfidler?
-FABADA11,  //china?
+FABADA11,  //china?
+# 20 most common len==8
+#12345678,
+#11111111,
+#88888888,
+87654321,
+#00000000,
+12341234,
+69696969,
+12121212,
+#11223344,
+12344321,
+#77777777,
+#99999999,
+#22222222,
+#55555555,
+#33333333,
+#44444444,
+#66666666,
+11112222,
+13131313,
+10041004,
+##
+31415926, //pii
+abcd1234,
+20002000,
+19721972,
+aa55aa55, //amiboo
+55aa55aa, //rev amiboo
+4f271149, // seeds ul-ev1
+07d7bb0b, // seeds ul-ev1
+9636ef8f, // seeds ul-ev1
+b5f44686, // seeds ul-ev1