Adam Sampson

Fix sprintf that should be snprintf

Fix sprintf that should be snprintf

Fix compilation with GCC 15

Fix missing prototypes

Fix variables declared with implicit int type

Fix -fno-common problems

Fix build with GCC 15

A better fix is just to change the type of l to socklen_t: https://offog.org/git/garstow/media/libcddb/patches/gcc-15.diff The pointer cast will silently give the wrong behaviour if the types aren't the same (and strictly it's UB in modern C).