Additional description (if needed):
This is minor update, but it makes the diff from eggdrop tcl.m4 to upstream tcl.m4 smaller and thus future updates easier to maintain
Please run misc/runautotools when merging this PR
Test cases demonstrating functionality (if applicable):
Found by: michaelortmann Patch by: michaelortmann Fixes: #1615
One-line summary: Update tcl.m4 to https://core.tcl-lang.org/tclconfig/artifact/0d6cf0bab5 2018-01-11
Additional description (if needed): This is minor update, but it makes the diff from eggdrop tcl.m4 to upstream tcl.m4 smaller and thus future updates easier to maintain
Please run misc/runautotools when merging this PR
Test cases demonstrating functionality (if applicable):