Add godoc comments to all internal packages

internal/configfile/config_file.go

@@ -1,3 +1,5 @@
+// Package configfile reads and writes gocryptfs.conf does the key
+// wrapping.
 package configfile
 
 import (

internal/contentenc/content.go

@@ -1,7 +1,6 @@
+// Package contentenc encrypts and decrypts file blocks.
 package contentenc
 
-// File content encryption / decryption
-
 import (
 	"bytes"
 	"encoding/binary"

internal/cryptocore/cryptocore.go

@@ -1,3 +1,5 @@
+// Package cryptocore wraps OpenSSL and Go GCM crypto and provides
+// a nonce generator.
 package cryptocore
 
 import (

internal/fusefrontend/fs.go

@@ -1,3 +1,4 @@
+// Package fusefrontend interfaces directly with the go-fuse library.
 package fusefrontend
 
 // FUSE operations on paths

internal/nametransform/names.go

@@ -1,7 +1,6 @@
+// Package namtransforms encrypts and decrypts filenames.
 package nametransform
 
-// Filename encryption / decryption functions
-
 import (
 	"crypto/aes"
 	"encoding/base64"

internal/prefer_openssl/prefer.go

@@ -1,3 +1,5 @@
+// Package prefer_openssl tries to determine if we should prefer openssl
+// on the platform we are running on.
 package prefer_openssl
 
 import (

internal/readpassword/read.go

@@ -1,3 +1,4 @@
+// Package readpassword reads a password from the terminal of from stdin.
 package readpassword
 
 import (

internal/syscallcompat/sys_linux.go

@@ -1,3 +1,4 @@
+// Package syscallcompat wraps Linux-specific syscalls.
 package syscallcompat
 
 import (

internal/tlog/log.go

@@ -1,3 +1,5 @@
+// Package tlog is a "toggled logger" that can be enabled and disabled and
+// provides coloring.
 package tlog
 
 import (