rules: added eC and e?C which are extended title case rule

doc/RULES

@@ -272,6 +272,10 @@ s?CY	replace all characters of class C in the word with Y
 %NX	reject the word unless it contains at least N instances of X
 %N?C	reject the word unless it contains at least N characters of class C
 U       reject the word unless it is valid UTF-8 (use with -u rule reject)
+eC	title case, where C is the separation character
+e?C	title case, with chars from class C as separation characters.
+	NOTE, see hashcat specific 'E' rule which is generic title case for space
+	only characters.  The 'e' rule extendeded more powerful version.
 
 Note that U will accept plain ASCII. It will only reject words that contain
 8-bit characters but can't be parsed as UTF-8. It can be used to reject

src/rules.c

@@ -2232,17 +2232,16 @@ char *rules_apply(char *word_in, char *rule, int split, char *last)
 			}
 			break;
 
-		/*case 'e':
+		case 'e': /* extended title case JtR specific, not HC 'yet' */
 			{
-				/ *
-				 * todo. Was thinking an 'extended' version of
-				 * the E command. Something that would also
-				 * case after symbols, etc. So something like
-				 * my-login-account -> My-Login-Account
-				 * /
+				int up=1;
+				CLASS(0,
+				      up=1,
+				      if(up) in[pos] = conv_toupper[ARCH_INDEX(in[pos])];
+				      else   in[pos] = conv_tolower[ARCH_INDEX(in[pos])];
+				      up=0)
 			}
 			break;
-		*/
 
 		default:
 			goto out_ERROR_UNKNOWN;