Move NetFS to a package

This is based on Jalopeura's patch to #10191, however, there are some
changes.
From the patch:
* Make userlandfs use separate "interface definition" files for each
filesystem, so the netfs package can provide a configuration file
* Add a short document on how to use NetFS
* Various fixes to netfs to make it build again (volatile atomics)
* The netfs_mount script for easier use of NetFS

Additional fixes:
* Move netfs_mount and the interface description file to data/ in the
source tree
* Use strlcat instead of strcat to avoid a buffer overflow
* Some parts were already applied in previous commits

build/jam/HaikuPackages

@@ -6,6 +6,7 @@ local packages =
 	HaikuUserguide
 	HaikuWelcome
 	MakefileEngine
+	NetFS
 	UserlandFS
 	;
 

build/jam/OptionalPackages

@@ -13,8 +13,6 @@
 #	FFMpeg					- audio/video library
 #	FFMpeg-devel			- FFMpeg development files
 #	Git						- the distributed version control system
-#	NetFS					- the native networked file system components
-#	UserlandFS				- aids native file system development (like FUSE)
 #	WebPositive				- native, WebKit-based web browser
 #	Welcome					- introductory documentation to Haiku
 #	WifiFirmwareScriptData	- data files needed by install-wifi-firmwares.sh
@@ -188,38 +186,6 @@ if [ IsOptionalHaikuImagePackageAdded Git ] {
 }
 
 
-# NetFS network file system
-if [ IsOptionalHaikuImagePackageAdded NetFS ] {
-# TODO: Make this an actual package!
-# 	# userlandfs module
-# 	AddFilesToHaikuImage home config add-ons userlandfs
-# 		: netfs ;
-#
-# 	# servers
-# 	AddFilesToHaikuImage system servers : netfs_server ;
-# 	AddFilesToHaikuImage system servers
-# 		: authentication_server ;
-#
-# 	# tools
-# 	AddFilesToHaikuImage system bin : netfs_config ;
-# 	AddFilesToHaikuImage system bin : netfs_server_prefs ;
-#
-# 	#example settings for netfs_server
-# 	local netfsServerSettingsFiles = <driver-settings>netfs-server ;
-# 	SEARCH on $(netfsServerSettingsFiles)
-# 		= [ FDirName $(HAIKU_TOP) src add-ons kernel file_systems netfs ] ;
-# 	AddFilesToHaikuImage home config settings kernel drivers
-# 	: $(netfsServerSettingsFiles) ;
-#
-# 	#userlandfs settings are needed for netfs_config to work (ioctls)
-# 	local userlandfsServerSettingsFiles = <driver-settings>userlandfs ;
-# 	SEARCH on $(userlandfsServerSettingsFiles)
-# 		= [ FDirName $(HAIKU_TOP) src add-ons kernel file_systems userlandfs ] ;
-# 	AddFilesToHaikuImage home config settings kernel drivers
-# 		: $(userlandfsServerSettingsFiles) ;
-}
-
-
 # WebPositive
 if [ IsOptionalHaikuImagePackageAdded WebPositive ] {
 	local architectureObject ;

build/jam/packages/NetFS

@@ -0,0 +1,27 @@
+local netfsPackage = netfs.hpkg ;
+HaikuPackage $(netfsPackage) ;
+
+# userlandfs module
+AddFilesToPackage add-ons userlandfs : netfs ;
+
+# servers
+AddFilesToPackage servers : netfs_server ;
+AddFilesToPackage servers : authentication_server ;
+
+# tools
+AddFilesToPackage bin : netfs_config ;
+AddFilesToPackage bin : netfs_server_prefs ;
+AddFilesToPackage bin
+	: [ FDirName $(HAIKU_TOP) data bin netfs_mount ] ;
+
+# interface definition
+AddFilesToPackage data userlandfs file_systems
+	: [ FDirName $(HAIKU_TOP) data userlandfs file_systems netfs ]
+	: netfs ;
+
+# docs
+AddFilesToPackage documentation add-ons :
+	[ FDirName $(HAIKU_TOP) docs add-ons NetFS.html ] : NetFS.html ;
+
+BuildHaikuPackage $(netfsPackage) : netfs ;
+

build/jam/repositories/Haiku

@@ -15,6 +15,7 @@ local packages =
 	haiku_userguide
 	haiku_welcome
 	makefile_engine
+	netfs
 	userland_fs
 
 	haiku_$(secondaryArchs)