interlink fixes colvars, plumed, and smd

doc/src/fix_colvars.txt

@@ -116,7 +116,8 @@ not a limitation of functionality.
 
 [Related commands:]
 
-"fix smd"_fix_smd.html
+"fix smd"_fix_smd.html, "fix spring"_fix_spring.html,
+"fix plumed"_fix_plumed.html
 
 [Default:]
 
@@ -126,4 +127,4 @@ and tstat = NULL.
 :line
 
 :link(Fiorin)
-[(Fiorin)] Fiorin , Klein, Henin, Mol. Phys., DOI:10.1080/00268976.2013.813594
+[(Fiorin)] Fiorin, Klein, Henin, Mol. Phys., DOI:10.1080/00268976.2013.813594

doc/src/fix_smd.txt

@@ -137,7 +137,8 @@ package"_Build_package.html doc page for more info.
 
 "fix drag"_fix_drag.html, "fix spring"_fix_spring.html,
 "fix spring/self"_fix_spring_self.html,
-"fix spring/rg"_fix_spring_rg.html
+"fix spring/rg"_fix_spring_rg.html,
+"fix colvars"_fix_colvars.html, "fix plumed"_fix_plumed.html
 
 [Default:] none