Remove TAG_ITER_DECLARECOUNTER

This branch gets rid of the need to use TAG_ITER_DECLARECOUNTER for tag iterations, and declares the counter variables inside the for loops on the loop macros instead (RIP C89), each given a unique name based on their line via __LINE__ and therefore avoiding variable shadowing.

added 1 commit

• a57c695f - Update example comment.

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added 10 commits

• a57c695f...41fe113a - 9 commits from branch next
• 66d858fb - Merge branch 'next' of https://git.do.srb2.org/STJr/SRB2 into remove-iterdeclarations

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merged

mentioned in commit b49238f7

changed milestone to %2.2.10