geniuspaste: Fix replace configurations with GLib 2.79+

We used the invalid single-backslash in pastebin configurations, which
used to work fine for our case until GLib 2.79.  Fix this by using
proper double-backslashes which work with all versions.

geniuspaste/data/dpaste.org.conf

@@ -10,7 +10,7 @@ lexer=%language%
 
 [parse]
 search=^"(.+)"$
-replace=\1
+replace=\\1
 
 [defaults]
 language=_code

geniuspaste/data/fpaste.org.conf

@@ -17,7 +17,7 @@ title=%title%
 
 [parse]
 search="url" *: *"([^"]+)"
-replace=\1
+replace=\\1
 
 # map GeanyFileType=PastebinFileType
 [languages]

geniuspaste/data/pastebin.geany.org.conf

@@ -11,7 +11,7 @@ lexer=%language%
 
 [parse]
 search=^.+$
-replace=\0
+replace=\\0
 
 [defaults]
 language=text

geniuspaste/data/sprunge.us.conf

@@ -7,7 +7,7 @@ sprunge=%contents%
 
 [parse]
 search=^[[:space:]]*(.+?)[[:space:]]*$
-replace=\1?%language%
+replace=\\1?%language%
 
 # map GeanyFileType=PastebinFileType
 [languages]