======Description======
Mangle types are used by:
  * /[[lastlog command|lastlog]] -mangle
  * /[[log command|log]] mangle
  * /[[set mangle_inbound]]
  * /[[set mangle_outbound]]
  * The status bar

======Options======
All characters are grouped into one of 9 "types":
^Type number  ^ Description             ^ASCII characters                                                   ^
|0 | Normal chars            |32-127, 160-255                |
|1 | High bit control chars  |128-159                        |
|2 | Escape char             |%%^[%%                         |
|3 | Color char              |%%^C%%                         |
|4 | Highlight toggle        |%%^B ^E ^F ^O ^V ^_%%          |
|5 | Unsafe char             |%%^M%% (\r)                    |
|6 | Control char            |%%^@ ^A ^D ^H ^K ^L ^N ^P ^Q ^R ^T ^U ^W ^X ^Y ^Z ^\ ^] ^^%%       |
|7 | Beep                    |%%^G%%                         |
|8 | Tab                     |%%^I%%                         |
|9 | Non-destructive Space   |%%^S %%                        |

There are the 12 following mangle types:

| ESCAPE    | NORMALIZE      | COLOR           | REVERSE      |
| UNDERLINE | BOLD           | BLINK           | ND_SPACE     |
| ALT_CHAR  | ALL_OFF        | UNPRINTABLE     | OTHER        |

The mangle types transform the characters, according to this table:

| A | Character or sequence converted into an attribute     |
| M | Character mangled (ie, %%^A into ^VA^V%%)             |
| S | Character stripped, sequence (if any) NOT stripped    |
| X | Character stripped, sequence (if any) also stripped   |
| T | Transformed into other (safe) chars                   |
| - | No transformation                                     |

^Mangle type        ^ 0 ^ 1 ^ 2 ^ 3 ^ 4 ^ 5 ^ 6 ^ 7 ^ 8 ^ 9 ^
|(default)          | - | - | - | - | A | - | - | T | T | T |
|NORMALIZE          | - | - | A | A | - | X | M | - | - | - |
|ESCAPE             | - | - | S | - | - | - | - | - | - | - |
|COLOR              | - | - | - | X | - | - | - | - | - | - |
|(The rest of them) | - | - | - | - | X | - | - | - | - | - |
|UNPRINTABLE        | - | X | S | S | X | X | X | X | - | - |
|OTHER              | X | - | - | - | - | - | - | - | X | X |
|(/SET ALLOW_C1)    | - | X | - | - | - | - | - | - | - | - |

There are only *three* ambiguous cases:
  * Type 2: \\ ESCAPE has first priority, then NORMALIZE, and finally UNPRINTABLE
  * Type 3: \\ UNPRINTABLE has first priority, then NORMALIZE, and COLOR.  You need to use both NORMALIZE and COLOR to remove color changes in escape sequences
  * Type 6: \\ UNPRINTABLE has first priority over NORMALIZE.