fix comment

Author: masahide

client/conn.go

@@ -45,7 +45,8 @@ type Conn struct {
 	capability uint32
 	// client-set capabilities only
 	ccaps uint32
-	// Flags explicitly disabled via SetCapability/UnsetCapability
+	// Capability flags explicitly disabled by the client via UnsetCapability()
+	// These flags are removed from the final advertised capability set during handshake.
 	clientExplicitOffCaps uint32
 
 	attributes map[string]string
@@ -236,13 +237,14 @@ func (c *Conn) Ping() error {
 	return nil
 }
 
-// SetCapability enables the use of a specific capability
+// SetCapability marks the specified flag as explicitly enabled by the client.
 func (c *Conn) SetCapability(cap uint32) {
 	c.ccaps |= cap
 	c.clientExplicitOffCaps &^= cap
 }
 
-// UnsetCapability disables the use of a specific capability
+// UnsetCapability marks the specified flag as explicitly disabled by the client.
+// This disables the flag even if the server supports it.
 func (c *Conn) UnsetCapability(cap uint32) {
 	c.ccaps &^= cap
 	c.clientExplicitOffCaps |= cap