More manual page fixes

Fix PFSTRING code and add test

Commit-type: bug, housekeeping
Reported-by: Jose Roman

non-test and tutorial makefiles only need rules.doc not the full rules

Commit-type: documentation

Only makefiles in the test and tutorial directories need lib/petsc/conf/test

Commit-type: housekeeping

Fix manual pages based on reports from Jacob's lint tool

Commit-type: documentation

Remove now unneeded SOURCE* variables from makefiles

Commit-type: configure, housekeeping

Remove unneeded SOURCEH from makefiles

No longer used by docs or build

Move PetscStrcat() and PetscStrcpy() back to str.c, and 'soft deprecate' them

Clean up PETSc str ops to use more secure implementations where possible. These include:

- Use PetscStrncpy()/PetscStrlcat()/PetscMemcpy() over PetscStrcpy()/PetscStrcat()
- Use PetscArraycpy() over

Clean up PETSc str ops to use more secure implementations where possible. These include:

- Use PetscStrncpy()/PetscStrlcat()/PetscMemcpy() over PetscStrcpy()/PetscStrcat()
- Use PetscArraycpy() over PetscMemcpy() as appropriate for string buffer copying
- Use built in string from name over hardcoding
- Use sizeof over hardcoded length
- Replace some Strlcat with Strncpy when offset is known

show more ...

Remove empty preprocessor variables