Spelling fixes
Fix tristate duplicate __Vcellinp declaration
Fix wrong dot resolution under inlining.
Makefile: Distribute .gdbinit
Nice message on fopen with missing argument.
Makefile: Distribute .gdbinit
Tests: Clocking test to consider bug623.
Fix opening a VerilatedVcdC file multiple times, msg1021.
Merge branch 'master' into combdly