Nether Portal Spread

sendMessageOnPortalCreation  default true
When enabled, sends a message to players around the portal that the nether is spreading and that you can stop the spread with 'preventSpreadBlockAmountNeeded' of the 'preventSpreadBlockString' block.

messageOnPortalCreation  default "You feel a corrupt energy coming from the portal. The nether will slowly spread into the overworld unless %preventSpreadBlockAmountNeeded% %preventSpreadBlockString% are placed within a %portalSpreadRadius% block radius around the portal."
The message sent on portal creation.

sendMessageOnPreventSpreadBlocksFound  default true
When enabled, sends a message to players around the portal that the nether spread has stopped when the portal detects new 'preventSpreadBlockString' blocks.

messageOnPreventSpreadBlocksFound  default "With enough %preventSpreadBlockString% placed, you feel the corrupted energy fade."
The message sent on preventspread blocks found.

sendMessageOnPortalBroken  default true
When enabled, sends a message to players when a portal is broken.

messageOnPortalBroken  default "With the nether portal broken, the corrupted energy is no longer able to enter the overworld."
The message sent when a portal is broken.

prefixPortalCoordsInMessage  default true
When enabled, shows the portal coordinates in portal messages.

portalSpreadRadius  default 15, min 1, max 100
The radius around the portal to which the nether blocks can spread.

spreadDelayTicks   default 40, min 1, max 72000
 The delay in ticks in between the spread around the nether portal. 20 ticks = 1 second.

instantConvertAmount  default 50, min 0, max 1000
The amount of blocks that are instantly converted to a nether block around a portal when it is detected. If there are existing nether blocks within the radius, their count is subtracted from this number.

preventSpreadWithBlock  default true
When enabled, blocks the spread effect when there are n (defined) prevent-spread-blocks (defined) within the radius.

preventSpreadBlockAmountNeeded  default 4
The amount of prevent-spread-blocks (defined) needed within the radius of the nether portal to prevent spread.

preventSpreadBlockString  default "minecraft:coal_block"
The block which prevents the nether portal from spreading. By default a coal block (minecraft:coal_block is the namespace ID).

stone; [netherrack>10 + magma_block>2 + nether_quartz_ore>1],
grass; [nether_sprouts>1],
cobblestone; [blackstone>1],
grass_block; [crimson_nylium>1],
dirt; [netherrack>1],
coarse_dirt; [soul_soil>1],
sand; [soul_sand>1 + soul_soil>1],
red_sand; [soul_soil>1 + soul_sand>1],
sandstone; [blackstone>1],
cut_sandstone; [polished_blackstone>1],
chiseled_sandstone; [chiseled_polished_blackstone>1],
smooth_sandstone; [basalt>1],
smooth_red_sandstone; [basalt>1],
gravel; [soul_soil>1],
stone_bricks; [nether_bricks>2 + red_nether_bricks>1],
sea_lantern; [glowstone>1],
farmland; [soul_sand>1],
wheat; [nether_wart>1],
gold_ore; [nether_gold_ore>1],
fern; [nether_sprouts>1],
oak_leaves; [nether_wart_block>1],
spruce_leaves; [nether_wart_block>1],
birch_leaves; [warped_wart_block>1],
jungle_leaves; [warped_wart_block>1],
acacia_leaves; [nether_wart_block>1],
dark_oak_leaves; [warped_wart_block>1],
oak_log; [crimson_stem>1],
spruce_log; [crimson_stem>1],
birch_log; [warped_stem>1],
jungle_log; [warped_stem>1],
acacia_log; [crimson_stem>1],
dark_oak_log; [warped_stem>1],