symbols-in-versions: added 119 missing symbols

I've developed a script I call symbol-scan.pl that scans the curl.h and
multi.h header files and compare the symbols it finds in there with the
symbols symbols-in-versions documents and outputs a report on the
differences.  Using this I've dug through the history to fill up
symbols-in-versions with all the symbols my script found mismatches for.

I will commit symbol-scan.pl separatly and think of a way to put it to
use in the build/tests so that we from now on will get this in-sync
check automatically.