Fix changelog.
Changelog fix (Grunt)
No longer list coagulated blood in \ (#9099)
More colourful defaults for console glyphs, mostly potions and scrolls.

This is in order to make use of colours instead of showing all scrolls in white
and all potions in their natural colour. This uses a new defaults file
 glyph_colours.txt
and it sets all potions and scrolls with properties among
 good_items, emergency_items, dangerous_items, forbidden_items
to their inventory colours. Moreover, it affects basically items via
 useless -> darkgrey
 unidentified -> lightblue
Improve malmutate changelog description (alefury)
Don't let acid spit pierce (magicpoints, wheals)

This means that it's now blockable by shields (& doesn't cause
Corr when blocked), which is probably wrong, but less wrong than
the previous situation.
Give fair warning for chopping up Xtahua (9100)

Also, Gastronok, and any other weird intelligent monsters of an
unintelligent class.
Make AF_CORRODE corrode on 0-damage hits

To make it more effective against heavily-armoured characters than
evasive characters, basically.

Also reduce damage, now that it no longer needs to be high to
punch through AC and proc the stacks.
Add a few new Yiufisms (theTower)

An affectionate homage to the Ulysses of the Internet.
Make wizmode super-heal reset your corrosion counter properly.
Fix a harmless warning that a variable could be unset.
Updated Halls of the Hellbinder sigil tiles, larger wolf spider tile.