Move all lua related files to lua/ subfolder

Also remove the lexers sub directory from the Lua search path.
As a result we attempt to open fewer files during startup:

 $ strace -e open -o log ./vis +q config.h && wc -l log

In order to avoid having to modifiy all lexers which `require('lexer')`
we instead place a symlink in the top level directory.

 $ ./configure --disable-lua
 $ rm -rf lua

Should result in a source tree with most lua specifc functionality
removed.

1 files changed, 0 insertions, 274 deletions

diff --git a/lexers/networkd.lua b/lexers/networkd.lua
deleted file mode 100644
index 3f27bae..0000000
--- a/lexers/networkd.lua
+++ /dev/null
@@ -1,274 +0,0 @@
--- Copyright 2016 Christian Hesse
--- systemd networkd file LPeg lexer.
-
-local l = require('lexer')
-local token, word_match = l.token, l.word_match
-local P, R, S = lpeg.P, lpeg.R, lpeg.S
-
-local M = {_NAME = 'networkd'}
-
--- Whitespace.
-local ws = token(l.WHITESPACE, l.space^1)
-
--- Comments.
-local comment = token(l.COMMENT, l.starts_line(S(';#')) * l.nonnewline^0)
-
--- Strings.
-local sq_str = l.delimited_range("'")
-local dq_str = l.delimited_range('"')
-local section_word = word_match{
-  'Address',
-  'Link',
-  'Match',
-  'Network',
-  'Route',
-  'DHCP',
-  'DHCPServer',
-  'Bridge',
-  'BridgeFDB',
-  'NetDev',
-  'VLAN',
-  'MACVLAN',
-  'MACVTAP',
-  'IPVLAN',
-  'VXLAN',
-  'Tunnel',
-  'Peer',
-  'Tun',
-  'Tap',
-  'Bond'
-}
-local string = token(l.STRING, sq_str + dq_str + '[' * section_word * ']')
-
--- Numbers.
-local dec = l.digit^1 * ('_' * l.digit^1)^0
-local oct_num = '0' * S('01234567_')^1
-local integer = S('+-')^-1 * (l.hex_num + oct_num + dec)
-local number = token(l.NUMBER, (l.float + integer))
-
--- Keywords.
-local keyword = token(l.KEYWORD, word_match{
-  -- boolean values
-  'true',
-  'false',
-  'on',
-  'off',
-  'yes',
-  'no',
-})
-
--- Options.
-local option_word = word_match{
-  -- match section options
-  'MACAddress',
-  'OriginalName',
-  'Path',
-  'Driver',
-  'Type',
-  'Host',
-  'Name',
-  'Virtualization',
-  'KernelCommandLine',
-  'Architecture',
-
-  -- link section options
-  'Description',
-  'Alias',
-  'MACAddressPolicy',
-  'MACAddress',
-  'NamePolicy',
-  'Name',
-  'MTUBytes',
-  'BitsPerSecond',
-  'Duplex',
-  'WakeOnLan',
-
-  -- network section options
-  'Description',
-  'DHCP',
-  'DHCPServer',
-  'LinkLocalAddressing',
-  'IPv4LLRoute',
-  'IPv6Token',
-  'LLMNR',
-  'MulticastDNS',
-  'DNSSEC',
-  'DNSSECNegativeTrustAnchors',
-  'LLDP',
-  'BindCarrier',
-  'Address',
-  'Gateway',
-  'DNS',
-  'Domains',
-  'NTP',
-  'IPForward',
-  'IPMasquerade',
-  'IPv6PrivacyExtensions',
-  'IPv6AcceptRouterAdvertisements',
-  'IPv6DuplicateAddressDetection',
-  'IPv6HopLimit',
-  'Bridge',
-  'Bond',
-  'VLAN',
-  'MACVLAN',
-  'VXLAN',
-  'Tunnel',
-
-  -- address section options
-  'Address',
-  'Peer',
-  'Broadcast',
-  'Label',
-
-  -- route section options
-  'Gateway',
-  'Destination',
-  'Source',
-  'Metric',
-  'Scope',
-  'PreferredSource',
-
-  -- dhcp section options
-  'UseDNS',
-  'UseNTP',
-  'UseMTU',
-  'SendHostname',
-  'UseHostname',
-  'Hostname',
-  'UseDomains',
-  'UseRoutes',
-  'UseTimezone',
-  'CriticalConnection',
-  'ClientIdentifier',
-  'VendorClassIdentifier',
-  'RequestBroadcast',
-  'RouteMetric',
-
-  -- dhcpserver section options
-  'PoolOffset',
-  'PoolSize',
-  'DefaultLeaseTimeSec',
-  'MaxLeaseTimeSec',
-  'EmitDNS',
-  'DNS',
-  'EmitNTP',
-  'NTP',
-  'EmitTimezone',
-  'Timezone',
-
-  -- bridge section options
-  'UnicastFlood',
-  'HairPin',
-  'UseBPDU',
-  'FastLeave',
-  'AllowPortToBeRoot',
-  'Cost',
-
-  -- bridgefdb section options
-  'MACAddress',
-  'VLANId',
-
-  -- netdev section options
-  'Description',
-  'Name',
-  'Kind',
-  'MTUBytes',
-  'MACAddress',
-
-  -- bridge (netdev) section options
-  'HelloTimeSec',
-  'MaxAgeSec',
-  'ForwardDelaySec',
-
-  -- vlan section options
-  'Id',
-
-  -- macvlan, macvtap and ipvlan section options
-  'Mode',
-
-  -- vxlan section options
-  'Id',
-  'Group',
-  'TOS',
-  'TTL',
-  'MacLearning',
-  'FDBAgeingSec',
-  'MaximumFDBEntries',
-  'ARPProxy',
-  'L2MissNotification',
-  'L3MissNotification',
-  'RouteShortCircuit',
-  'UDPCheckSum',
-  'UDP6ZeroChecksumTx',
-  'UDP6ZeroCheckSumRx',
-  'GroupPolicyExtension',
-  'DestinationPort',
-  'PortRange',
-
-  -- tunnel section options
-  'Local',
-  'Remote',
-  'TOS',
-  'TTL',
-  'DiscoverPathMTU',
-  'IPv6FlowLabel',
-  'CopyDSCP',
-  'EncapsulationLimit',
-  'Mode',
-
-  -- peer section options
-  'Name',
-  'MACAddress',
-
-  -- tun and tap section options
-  'OneQueue',
-  'MultiQueue',
-  'PacketInfo',
-  'VNetHeader',
-  'User',
-  'Group',
-
-  -- bond section options
-  'Mode',
-  'TransmitHashPolicy',
-  'LACPTransmitRate',
-  'MIIMonitorSec',
-  'UpDelaySec',
-  'DownDelaySec',
-  'LearnPacketIntervalSec',
-  'AdSelect',
-  'FailOverMACPolicy',
-  'ARPValidate',
-  'ARPIntervalSec',
-  'ARPIPTargets',
-  'ARPAllTargets',
-  'PrimaryReselectPolicy',
-  'ResendIGMP',
-  'PacketsPerSlave',
-  'GratuitousARP',
-  'AllSlavesActive',
-  'MinLinks',
-}
-local preproc = token(l.PREPROCESSOR, option_word)
-
--- Identifiers.
-local word = (l.alpha + '_') * (l.alnum + S('_.'))^0
-local identifier = token(l.IDENTIFIER, word)
-
--- Operators.
-local operator = token(l.OPERATOR, '=')
-
-M._rules = {
-  {'whitespace', ws},
-  {'keyword', keyword},
-  {'string', string},
-  {'preproc', preproc},
-  {'identifier', identifier},
-  {'comment', comment},
-  {'number', number},
-  {'operator', operator},
-}
-
-M._LEXBYLINE = true
-
-return M