*: add "noexcept" to many, many function prototypes

This eliminates some overhead, because the compiler doesn't need to
consider these functions throwing.

src/net/StaticSocketAddress.cxx

@@ -35,7 +35,7 @@
 #include <string.h>
 
 StaticSocketAddress &
-StaticSocketAddress::operator=(SocketAddress other)
+StaticSocketAddress::operator=(SocketAddress other) noexcept
 {
 	size = std::min(other.GetSize(), GetCapacity());
 	memcpy(&address, other.GetAddress(), size);