Fixed dead links (#2451)

* Fixed typo of 'confid.h' to 'config.h'

* Fixed broken links in docs

* Fixed a lot of dead links

keyboards/s60_x/keymaps/custom/readme.md

@@ -1,5 +1,5 @@
 ### 8  Custom
-The custom keymap - [keymap_custom.c](keymap_custom.c) - is where I tested all the switches, not being concerned with a specific layout or layers. It's a plain layout option with the extra keys used on ISO & HHKB layouts being assigned some other keys.
+The custom keymap - [keymap.c](keymap.c) - is where I tested all the switches, not being concerned with a specific layout or layers. It's a plain layout option with the extra keys used on ISO & HHKB layouts being assigned some other keys.
 
 #### 8.0 Default layer
     ┌─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┐

keyboards/s60_x/keymaps/hasu/readme.md

@@ -1,4 +1,4 @@
 ### 5. Hasu
-This is Hasu's favorite keymap with HHKB Fn, Vi cursor and Mousekey layer. See [keymap_hasu.c](keymap_hasu.c) for detail.
+This is Hasu's favorite keymap with HHKB Fn, Vi cursor and Mousekey layer. See [keymap.c](keymap.c) for detail.
 
 (Hasu is the initial creator of the TMK firmware, in case you weren't aware.)

keyboards/s60_x/keymaps/hhkb/readme.md

@@ -1,5 +1,5 @@
 ### 7. HHKB
-[keymap_hhkb.c](keymap_hhkb.c) emulates original HHKB layers.
+[keymap.c](keymap.c) emulates original HHKB layers.
 #### 7.0: Default layer
     ┌─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┐
     │ Esc │  1  │  2  │  3  │  4  │  5  │  6  │  7  │  8  │  9  │  0  │  -  │  =  │  \  │  `  │

keyboards/s60_x/keymaps/plain/readme.md

@@ -1,6 +1,6 @@
 ### 4. Plain
 Without any Fn layer this will be useful if you want to use key remapping tool like AHK on host.
-See [keymap_plain.c](keymap_plain.c) for detail.
+See [keymap.c](keymap.c) for detail.
 
 #### 4.0 Plain Default layer
     ┌─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┐

keyboards/s60_x/keymaps/poker/readme.md

@@ -1,6 +1,6 @@
 ### 3  Poker
-[keymap_poker.c](keymap_poker.c) emulates original Poker layers
-while both [keymap_poker_bit.c](keymap_poker_bit.c) and [keymap_poker_set.c](keymap_poker_set.c) implements same layout in different way and they fix a minor issue of original Poker and enhance arrow keys.
+[keymap_poker](../poker/readme.md) emulates original Poker layers
+while both [keymap_poker_bit](../poker_bit/readme.md) and [keymap_poker_set](../poker_set/readme.md) implements same layout in different way and they fix a minor issue of original Poker and enhance arrow keys.
 
     Fn + Esc = `
     Fn + {left, down, up, right}  = {home, pgdown, pgup, end}

keyboards/s60_x/keymaps/poker_bit/readme.md

@@ -1,6 +1,6 @@
 ### 3  Poker
-[keymap_poker.c](keymap_poker.c) emulates original Poker layers
-while both [keymap_poker_bit.c](keymap_poker_bit.c) and [keymap_poker_set.c](keymap_poker_set.c) implements same layout in different way and they fix a minor issue of original Poker and enhance arrow keys.
+[keymap_poker](../poker/readme.md) emulates original Poker layers
+while both [keymap_poker_bit](../poker_bit/readme.md) and [keymap_poker_set](../poker_set/readme.md) implements same layout in different way and they fix a minor issue of original Poker and enhance arrow keys.
 
     Fn + Esc = `
     Fn + {left, down, up, right}  = {home, pgdown, pgup, end}

keyboards/s60_x/keymaps/poker_set/readme.md

@@ -1,6 +1,6 @@
 ### 3  Poker
-[keymap_poker.c](keymap_poker.c) emulates original Poker layers
-while both [keymap_poker_bit.c](keymap_poker_bit.c) and [keymap_poker_set.c](keymap_poker_set.c) implements same layout in different way and they fix a minor issue of original Poker and enhance arrow keys.
+[keymap_poker](../poker/readme.md) emulates original Poker layers
+while both [keymap_poker_bit](../poker_bit/readme.md) and [keymap_poker_set](../poker_set/readme.md) implements same layout in different way and they fix a minor issue of original Poker and enhance arrow keys.
 
     Fn + Esc = `
     Fn + {left, down, up, right}  = {home, pgdown, pgup, end}

keyboards/s60_x/keymaps/spacefn/readme.md

@@ -1,5 +1,5 @@
 ### 6. SpaceFN
-This layout proposed by spiceBar uses space bar to change layer with using Dual role key technique. See [keymap_spacefn.c](keymap_spacefn.c) and [SpaceFN discussion](http://geekhack.org/index.php?topic=51069.0).
+This layout proposed by spiceBar uses space bar to change layer with using Dual role key technique. See [keymap.c](keymap.c) and [SpaceFN discussion](http://geekhack.org/index.php?topic=51069.0).
 
 #### 6.0 Default layer
     ┌─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┐